The deadly attack on the Tree of Life Synagogue in Pittsburgh's residential Squirrel Hill neighborhood is being investigated as a hate crime, federal prosecutors said, and the Anti-Defamation League said it believes the shooting is the deadliest attack on the Jewish community in US history.
According to officials, Bowers expressed hatred of Jews during the rampage, and told officers after he was caught that they were committing genocide and he wanted them all to die.
Robert Bowers, 46, of suburban Baldwin, surrendered to authorities after Saturday morning's shooting at the Tree of Life synagogue.
The Anti-Defamation League [ADL] said the shooting was the most deadly attack against Jewish people in America and came amid an increase in antisemitic attacks in the US. I can't wait while my people are getting slaughtered.
Mr Brady announced on Sunday he is seeking the death penalty, though the final decision on this lies with Attorney General Jeff Sessions.
He said the shooting will undoubtedly have a ripple effect and cause some worshippers in any synagogue to feel vulnerable.
The affidavit said a tactical team found Bowers on the third floor of the synagogue, where he shot two other officers.
Bowers faces 11 counts of criminal homicide, six counts of aggravated assault and 13 counts of ethnic intimidation in addition to federal counts that include weapons offenses.
Bowers has no known criminal record, according to the paper, but had on occasion had "contacts" with local police over non-criminal issues.
It said it backed up Mr Bowers' user data and suspended his account, then told the Federal Bureau of Investigation (FBI) what it had done.More news: US Muslims Raise Large Amounts of Money for Synagogue Shooting Victims
The gunman targeted a building that housed three separate congregations, all of which were conducting Sabbath services when the attack began just before 10 a.m.in the tree-lined residential neighbourhood of Squirrel Hill, about 10 minutes from downtown Pittsburgh and the hub of Pittsburgh's Jewish community.
Cecil Rosenthal, 59, of Squirrel Hill, Pa. The Anti-Defamation League called it the deadliest US attack on Jews.
"All of us can relate to what happened", Poupko said. The hospital said in a statement that "the UPMC family, in particular UPMC Shadyside, can not even begin to express the sadness and grief we feel over the loss".
Gideon Murphy places a flower at the Tree of Life Synagogue in Pittsburgh, Sunday, Oct. 28, 2018.
Mr Hertzman, who used to worship at the synagogue attacked and knew two of the dead, said: "We've certainly seen that anti-Semitism is on the rise across the US". "Words can not express how we feel as members of the community".
But some critics want President Trump to admit accountability for the carnage too. "That's what we're going to continue to do, we're going to continue to welcome people and open our arms". By the way, last year, anti-Semitic attacks in this country grew by 60 percent. "As we stand here together, we must hold love and light in our hearts because those are the forces that will extinguish the darkness and hate that has been called up in our country and around the world". "We must unite to conquer hate".
The Centre for Israel and Jewish Affairs, a Toronto-based advocacy group, said similar events were also planned in Hamilton in Winnipeg.
Pope Francis at the Vatican called the massacre an "inhuman act of violence". "We will be here to help you through this horrific episode".
Pope Francis led prayers for Pittsburgh on Sunday in St. Peter's Square. "And we all pray for the speedy recovery of the wounded".