Meanwhile, the chief medical examiner of the Allegheny County named the dead on Sunday.
David and Cecil Rosenthal, aged 54 and 59 respectively, were identified as the brothers who were killed.
Vanessa Ressler was taken aback Sunday when her 8-year-old daughter Micah asked her a very hard question - "Mommy, could that happen here?"
Wax was in his late 80s.
Authorities say gunman Bowers made statements about genocide and killing Jewish people.
Dozens of people gathered at the Canadian Monument for Human Rights in Ottawa on Sunday for a candlelight vigil to commemorate the 11 victims who died at the Pittsburgh synagogue on Saturday. As a former counselor at a Jewish summer camp, she shared one of her camper's grandmother was one of the 11 victims.
Victims taken to area hospitals included a 61-year-old woman, a 70-year-old man, and a 55-year-old officer. State authorities have also leveled charges.
The emerging evidence strongly suggests that the attack was motivated by anti-Semitism and was the deadliest against the Jewish community in the history of the US, as per the Anti Defamation League, a Jewish non-governmental organisation.
Steinmeier wrote that "this abhorrent crime reminds us all to do what is in our power to advocate against hatred and violence, against anti-Semitism and exclusion, and to counter with determination those who incite them".More news: OnePlus 6T launch countdown - United Kingdom price, release date, specs revealed TODAY
Pope Francis, at the end of the Angelus prayer in Saint Peter's Square, expressed his sadness at the violence. "I've heard the conversation over the past year about how we should arm security guards in our schools", Peduto said. He prayed for God "to help us to extinguish the flames of hatred that develop in our societies, reinforcing the sense of humanity, respect for life and civil and moral values".
"We'll get through this darkest day of Pittsburgh history by working together", he told reporters.
FBI Special Agent Robert Jones said he did not know why Bowers targeted the Tree of Life synagogue.
Federal prosecutors charged Bowers late on Saturday with 29 criminal counts including violating U.S. civil rights laws.
"Dangerous weapons are putting our citizens in harm's way", Pennsylvania Governor and Democrat Tom Wolf said on Saturday.
A crowdfunding campaign started by two Muslim groups, Celebrate Mercy and MPower Change, has raised (as of Monday morning) more than $130,000 for the victims of the shooting at a Pittsburgh synagogue on Saturday.
The two exchanged gunfire, he said, and Bowers reentered the building before a police tactical squad arrived.
The suspect, 46-year-old Robert Bowers of Pittsburgh, was taken into custody after a shootout with a SWAT team during which four police officers were wounded.