It wasn't clear whether Bowers has an attorney to speak on his behalf.
Myers said his synagogue "can't be used again in its present condition".
The 74-year-old spent most of her career at the University of Pittsburgh's Learning Research and Development Center, retiring in 2008 from her job as a researcher looking at learning in the classroom and in museums.
"The loss is incalculable", said Stephen Cohen, co-president of New Light Congregation, which rents space at Tree of Life.
The Centre for Israel and Jewish Affairs, a Toronto-based advocacy group, said similar events were also planned in Hamilton in Winnipeg. The victims included two brothers with intellectual disabilities, and a husband and wife.
Bowers is being treated for gunshot wounds and is due in court Monday. Daniel Leger was scheduled to lead a service Saturday morning, he said.
The shooting raised immediate alarm in Jewish communities around the country.
Jews make up only about 2 percent of the US population, but in annual Federal Bureau of Investigation data they repeatedly account for more than half of the Americans targeted by hate crimes committed due to religious bias.
"HIAS likes to bring invaders in that kill our people". "When people do this, they should get the death penalty". "Screw your optics, I'm going in", wrote Bowers, a heavy-set, white male.
Long before those incidents, many synagogues and Jewish organizations in the US had been ramping up security measures.More news: Duchess Meghan sells out yet another dress
At a press conference Sunday morning, officials said victims of a shooting rampage at a Pittsburgh synagogue range in age from 54 to 97.
Israeli Prime Minister Benjamin Netanyahu said he was "heartbroken and appalled" by the attack.
"The entire people of Israel grieve with the families of the dead", he said in a video message posted to Twitter after the massacre on Saturday.
There are few Jewish communities that have not been touched by anti-Semitic vandalism. "The Fake News Media, the true Enemy of the People, must stop the open & obvious hostility & report the news accurately & fairly", Trump tweeted, shortly after Lederman spoke to CNN.
In the basement, a half-dozen members of New Light Congregation were just starting to pray when they heard crashing sounds coming from upstairs, looked out the door and saw a body on the staircase, Werber, the survivor, recalled Sunday in an interview at his home. Late Sunday, one had been released, one was being considered for release and two others required longer treatment. A chant of "vote, vote, vote" broke out during the emotional gathering.
Jonathan Greenblatt, director of the Anti-Defamation League civil rights group that combats anti-Semitism - said he was encouraged by the president's words after Pittsburgh but also sounded a note of warning.
"Squirrel Hill is the most diverse neighborhood in all of western Pennsylvania", Peduto told reporters. Among its treasures is a "Holocaust Torah", rescued from Czechoslovakia.
Michael Eisenberg, the immediate past president of the Tree of Life, said synagogue officials had not received any threats that he knew of before the shooting. But security was a concern, he said, and the synagogue had started working to improve it.
"It's just a reminder that we have so much work to do as a country to overcome the hate that exist today", said Nauman Wadalwala, Islamic Foundation of Greater St. Louis. Not so on Saturday - the Jewish Sabbath - when the building was open for worship.
"It could have just as easily been our congregation", said Rabbi Aaron Bisno of nearby Rodef Shalom. "It just seems to be getting worse", Myers said.