Prosecutors set in motion plans to seek the death penalty against the truck driver, with the killing at the Tree of Life Synagogue believed to be the deadliest attack on Jews in USA history. He has been charged with 29-federal counts of hate crimes, murder and other charges.
Bowers surrendered and was taken to a hospital where he was listed in fair condition with multiple gunshot wounds.
FBI Special Agent Robert Jones told a news conference he did not know why Mr. Bowers had targeted the Tree of Life synagogue.
Robert Bowers had an active gun licence and owned 21 firearms, officials say.
A vigil set for Monday evening at Montreal's Beth Israel Beth Aaron synagogue will be a chance for community members to draw hope and strength from each other, he said in a phone interview. "My mother always taught me that if you don't have anything nice to say, don't say it".
Funerals for the 11 victims are also expected to begin this week, though it's unclear whether the criminal investigation will delay them.
Calling the shooting an "evil anti-Semitic attack", President Trump ordered flags at federal buildings throughout the U.S.to be flown at half-staff in respect for the victims. "You could go to him and present a jumble of physical symptoms and emotional reactions", and he could sort it all out, patient Jan Grice, of Shadyside, told the Pittsburgh Post-Gazette.
Some in the audience, many wearing clothing or wearing signs depicting his "Make America Great Again" slogan, shouted, "No".
Bowers's racism wasn't only directed at Jews, the Washington Post reports.
Lubin said it will be open to anyone and the details of the service are still being worked out. The group has been against Trump since he was elected, asking on its website "How do we stop Trump?" and urging people to get involved with the so-called resistance. "Screw your optics. I'm going in".
Meanwhile, Rabbi Gary Moskowitz - who is also a former police officer - also called for worshippers to arm themselves after an anti-Semitic gunman shot and killed 11 people at a synagogue in Pittsburgh on Saturday.
On top of Bowers's page, one quote said, "jews are the children of satan", according to screenshots of the now-suspended account released by the SITE Intelligence Group, which tracks extremist views. On Gab, he wrote that the migrants, who he preferred to call "invaders", were coming to the U.S.to commit violent acts.
United States media report that he is registered as an unaffiliated voter.
"When you spew hate speech, people act on it". That will do much to put out the flame of Anger and Outrage and we will then be able to bring all sides together in Peace and Harmony.
As you can imagine, more people are reading The Jerusalem Post than ever before.
"The crimes of violence are based upon the federal civil rights laws prohibiting hate crimes", the statement said.
The White House has formally condemned anti-Semitism and hate in the aftermath of the Pittsburgh synagogue massacre.