Robert D. Bowers, who authorities said attacked a Pittsburgh synagogue during Saturday morning services, appears to have targeted Jewish people on a social media account rife with anti-refugee, anti-Semitic and white supremacist posts.

The postings, which were listed under Bowers’s name on the social media site Gab before the account was deactivated Saturday afternoon, could offer the clearest window into the mindset of the 46-year-old, who police say stormed Tree of Life synagogue shouting anti-Semitic slurs and firing an assault rifle in an attack that left 11 people dead and six wounded, including one in critical condition.

Gab, a social media site similar to Facebook and Twitter that is popular with white supremacists and other far-right figures, confirmed that it had deactivated an account in Bowers’s name following the shooting.

The account, which appeared to have been started in January, included a bio that reads: “jews are the children of satan.” His background photo was a radar gun that reads “1488,” a number that combines two codes — the “14” referring to a 14-word white supremacist slogan and the “88” being a neo-Nazi symbol meaning “Heil Hitler.”

11 killed, several wounded, in Pittsburgh synagogue shooting

The account frequently reposted from others, including a cartoon referencing the phrase “zionist occupied government,” which white supremacists use to suggest that the government is controlled by Jewish people.

Police officers guard Tree of Life synagogue in Pittsburgh on Saturday after a shooter killed at least 11 people and wounded six others. (John Altdorfer/Reuters)

It also posted photos of bullet-riddled targets at a shooting range from July. The text of that posting read: “anyone looking for a 9x19 striker fired handgun? i recommend you take a look at the walther ppq. amazing trigger.”

The user also made reference to President Trump and challenged his views.

“Trump is a globalist, not a nationalist,” the user posted after a rally this week in which Trump declared himself a nationalist.

Trump has repeatedly slammed “globalists” in his public rhetoric, despite warnings that the term is understood to mean Jews in anti-Semitic circles. “There is no #MAGA as long as there is a k--- infestation,” the user wrote, using a slur for Jews.

The postings, which law enforcement officials have yet to confirm as authentic, may offer the clearest clues available about what may have motivated the suspect, who appears to have lived near Pittsburgh for several years and otherwise had a limited presence online.

Justin Gargis, 37, prays at a memorial in front of Tree of Life synagogue, one week after the mass shooting in Pittsburgh.The Washington Post
A man prays during the Shabbat service at Rodef Shalom in Pittsburgh.The Washington Post
People make their way to the Shabbat service.The Washington Post
Children play during Shabbat service at Rodef Shalom.The Washington Post
People attend the Shabbat service.The Washington Post
Shabbat service at Rodef Shalom.The Washington Post
People pray during the Shabbat service at Rodef Shalom.The Washington Post
Worshippers gather Friday, Nov. 2, in front of the Tree of Life Synagogue, in Pittsburgh’s Squirrel Hill neighborhood. It’s the first Shabbat since 11 people were killed in a mass shooting at the synagogue six days earlier.For The Washington Post
Relatives of Rose Mallinger, who was killed in the Tree of Life synagogue shooting, walk to the funeral at Tree of Life Memorial Park cemetery in Pittsburgh.The Washington Post
The procession for the funeral of Rose Mallinger arrives at Tree of Life Memorial Park cemetery.The Washington Post
People arrive at Tree of Life Memorial Park cemetery for the Mallinger funeral.The Washington Post
Members of Rose Mallinger’s family gather for her funeral at Tree of Life Memorial Park cemetery.The Washington Post
Mourners leave after the funeral of Bernice and Sylvan Simon, husband and wife who were killed in the shooting at Tree of Life synagogue, at Ralph Schugar chapel in Pittsburgh.The Washington Post
Rabbi Yisroel Rosenfeld, center, embraces a mourner after the Simons’ funeral in Pittsburgh.The Washington Post
Rabbi Rosenfeld, center left, speak with others after Bernice and Sylvan Simon’s funeral in Pittsburgh.The Washington Post
A hearse transporting the caskets of Bernice and Sylvan Simon crosses a bridge on the way to the cemetery in Pittsburgh.The Washington Post
National Cemetery of the Alleghenies in Pittsburgh during the service for Bernice and Sylvan Simon.The Washington Post
Mourners embrace during a processional outside of Congregation Beth Shalom for the funeral of Joyce Fienberg, who was killed in the shooting at nearby Tree of Life synagogue in Pittsburgh’s Squirrel Hill neighborhood.The Washington Post
People stand outside of Congregation Beth Shalom in Squirrel Hill during a processional for Fienberg’s funeral.The Washington Post
A processional of mourners outside Congregation Beth Shalom.The Washington Post
Mourners at Fienberg’s funeral.The Washington Post
Men chat outside Congregation Beth Shalom during the funeral.The Washington Post
Mourners outside of Congregation Beth Shalom.The Washington Post
Joyce Fienberg’s casket is carried out of Congregation Beth Shalom.The Washington Post
Fienberg’s casket is placed in a hearse outside Congregation Beth Shalom.The Washington Post
A hearse leaves Ralph Schugar funeral chapel after the funeral of Melvin Wax, who was killed in the shooting at Tree of Life synagogue.The Washington Post
The hearse with Wax’s casket leaves Ralph Schugar funeral chapel.The Washington Post
The casket of Irving Younger, one of the shooting victims, is carried out of Rodef Shalom after funeral services in Pittsburgh’s Oakland neighborhood.For The Washington Post
Mourners gather around the gravesite of Irving Younger at Shaare Torah Cemetery in Brentwood.For The Washington Post
People embrace outside Rodef Shalom synagogue in Pittsburgh for the funeral of brothers David Rosenthal and Cecil Rosenthal.The Washington Post
People wait in line outside Rodef Shalom to attend the funeral.The Washington Post
Mourners embrace as the brothers’ caskets are taken from the synagogue.The Washington Post
The caskets of the brothers are carried from the synagogue.The Washington Post
Mourners stand outside the synagogue.The Washington Post
Gene Tabachnick, a friend of brothers David Rosenthal and Cecil Rosenthal, who were killed in the synagogue shooting, fills their graves at Tree of Life Memorial Park cemetery as part of kevurah, the traditional Jewish burial.The Washington Post
President Trump, left, accompanied by first lady Melania Trump and Tree of Life Rabbi Jeffrey Myers, puts down a stone from the White House at a memorial for those killed at the synagogue.AP
Protesters gather to protest President Trump’s visit to Tree of Life synagogue.The Washington Post
People protest Trump’s visit.The Washington Post
Police in riot gear watch the protesters.The Washington Post
Protesters sit in the middle of the road.The Washington Post
Flowers and messages are laid at a memorial near Tree of Life synagogue in Pittsburgh.The Washington Post
Yeshiva High School students pray at a memorial in front of Tree of Life synagogue in Pittsburgh. Police identified the alleged shooter as Robert D. Bowers.The Washington Post
Jerry Clouden, 51, stops at a memorial near Tree of Life synagogue.The Washington Post
Flowers and messages are laid at a memorial.The Washington Post
Mourners gather at a memorial in front of Tree of Life synagogue in Pittsburgh after a shooting there left 11 people dead and several others wounded.For The Washington Post
A Yeshiva High School student holds a Jewish prayer book as she prays with her classmates at a memorial in front of Tree of Life synagogue.The Washington Post
Yeshiva High School students pray at a memorial in front of Tree of Life synagogue.The Washington Post
Police tape cordons off the area outside Tree of Life synagogue in Pittsburgh.Brendan Smialowski | AFP/Getty Images
U.S. Attorney Scott Brady speaks during a news conference.AP
A Pittsburgh police officer holds a box of cookies while talking with children outside the synagogue.AFP/Getty Images
Women embrace in front of the makeshift memorial.AFP/Getty Images
Kris Kepler of Hazelwood, a neighborhood in Pittsburgh, comforts another mourner in front of Tree of Life synagogue.For The Washington Post
Visitors mourn in front of Tree of Life synagogue.For The Washington Post
Women lay flowers at the memorial.AFP/Getty Images
Pittsburgh Steelers fans bow their head for a moment of silence to honor the victims of the shooting before the game.Usa Today Sports
Mourners at the Soldiers and Sailors Memorial Hall and Museum.For The Washington Post
Mourners stands outside of Soldiers and Sailors Memorial Hall and Museum.For The Washington Post
Mourners during a vigil to remember the victims.For The Washington Post
Dima Kislovskiy, right, and Yasaswi Paruchuri, left, hold back tears during a vigil.For The Washington Post
People hug after a vigil to remember the victims at the Allegheny County Soldiers Memorial.AFP/Getty Images
Rabbi Hazzan Jeffrey Myers, from Tree of Life synagogue, speaks during a vigil, to remember the victims at the Allegheny County Soldiers Memorial.AFP/Getty Images
Law enforcement officers secure the scene.AP
Police and medical personnel gather.AP
A man holds his head as he is escorted out of Tree of Life.AP
People gather near the synagogue.AP
Law enforcement personnel wheel a person on a stretcher.AP
From left, Kate Rothstein looks on as Tammy Hepps hugs Simone Rothstein, 16, after the shooting.AP
Neighbors embrace near Tree of Life.Getty Images
A woman watches from a block away.Getty Images
Pittsburgh Public Safety Director Wendell Hissrich, center, describes the shooting. He is flanked by Gov. Tom Wolf (D), center left, and Allegheny County Executive Rich Fitzgerald, right.Getty Images
Denise Fulton cries as she speaks with Bishop David Zubik, bishop of the Diocese of Pittsburgh, after she came to show support for members of the community.AFP/Getty Images
Volunteers from the FOCUS Pittsburgh trauma response team, left, talk with residents of Squirrel Hill.AP
Media tents and vehicles line an intersection near the synagogue.AP
A SWAT officer and other first responders stand at the scene.Reuters
People gather for a vigil on Murray and Forbes avenues, blocks from the shooting scene.AP
Mourners participate in a vigil on Saturday evening in Squirrel Hill.For The Washington Post
Photo Gallery: A gunman killed multiple people and wounded three police officers at Tree of Life synagogue in the Squirrel Hill area of Pittsburgh.

Robert Allan Jones, special agent in charge of the FBI’s Pittsburgh field office, said Saturday that “at this point, we have no knowledge that Bowers was known to law enforcement before today.”

Members of Bowers’s family could not be reached for comment, and it is unclear whether he had a job. One former neighbor, who spoke on the condition of anonymity, remembered Bowers as unremarkable.

“He stayed to himself,” said the man, who said that he lived across the street from Bowers on Fieldcrest Drive in Pittsburgh . “He smoked out on the front porch all of the time, and then would go in without saying much.”

Bowers moved out of that house in 2015.

The attack on Tree of Life is the deadliest U.S. attack to target Jewish people, according to the Anti-Defamation League.

It is at least the third mass shooting in recent years in which an aggrieved white man wielding an assault rifle has threatened a house of worship.

In 2015, nine parishioners were shot and killed at a historically black church in Charleston, S.C., by Dylann Roof, a white supremacist who was sentenced to nine consecutive life terms.

Last year, 26 people were killed in a church in Sutherland Springs, Tex., in a shooting carried out by Devin Patrick Kelley, who later shot and killed himself.

And last week, police said Gregory A. Bush, 51, attempted to enter Jeffersontown First Baptist Church, a historically black congregation in Louisville. After finding the door locked, they said, he went to a nearby grocery store where he shot and killed two black shoppers. He has been charged with murder, and federal investigators are considering charging him with a hate crime.

The most recent postings on the Gab account believed to belong to Bowers specifically targeted the Hebrew Immigrant Aid Society, known as HIAS, which is one of nine organizations that works with the federal government to resettle refugees in American communities.

“HIAS likes to bring invaders in that kill our people. I can’t sit by and watch my people get slaughtered. Screw your optics, I’m going in,” Bowers is suspected of writing hours before authorities said he opened fire at Tree of Life.

In one posting, which seems to have been published several weeks ago, the author appears to threaten participants in the HIAS’s National Refugee Shabbat project, for which more than 200 congregations across the country held celebration and worship services centered on refugees last week. The organization, founded in 1881 to assist Jews fleeing Russia and Eastern Europe, now works to resettle displaced people from around the world, including Muslim and Central and South American nations.

“Why hello there HIAS! You like to bring in hostile invaders to dwell among us? We appreciate the list of friends you have provided,” the poster wrote before linking to the Web page that lists all of the participating congregations.

Trump calls shooting at Pittsburgh synagogue that left 11 dead a ‘wicked act of mass murder’

“He clearly decided that HIAS was a Jewish agency and he was going to attack Jews,” said Mark Hetfield, president and chief executive of the HIAS, which has no formal relationship with Tree of Life synagogue. He said he was unaware of the threatening postings until after the shooting.

“Clearly, he hates both Jews and refugees,” Hetfield said. “Usually, people who hate others don’t just hate one group, they hate many.”

Hetfield said he was attending a bar mitzvah in the District when his phone began buzzing in his pocket with dozens of calls and messages about the shooting and the suspect’s alleged posts about the HIAS.

“Clearly, there is a lot of space and tolerance right now for intolerant speech, and that has to end,” Hetfield said. “No one should be looking the other way when they hear hate speech. We have to stand up to hate speech.”

Hetfield said that the HIAS has helped many refugees resettle in Pittsburgh, having placed 233 people in the region in 2016 and 122 in 2017. But the group managed just 42 placements this year after the Trump administration placed a historically low cap on the number of displaced people allowed to resettle in the United States.

“Our agency is the oldest refugee agency in the world, and we’ve seen some horrible dark periods in our time, and we’ve seen plenty of hate, and refugees by definition are fleeing hate,” Hetfield said. “But the United States is supposed to be a place of refuge, and a synagogue is supposed to be a place of refuge.”

Julie Tate, Abby Ohlheiser, Jennifer Jenkins and Alice Crites contributed to this report.