A makeshift memorial is growing outside a synagogue where 11 people were killed Saturday.
There is a white Star of David for each person killed, with their name inscribed.
Passersby laid flowers.
The gunman, Robert Gregory Bowers, opened fire with an AR-15 rifle and other weapons during worship services inside Tree of Life Synagogue, killing eight men and three women before a tactical police team tracked him down and shot him, according to state and federal affidavits made public on Sunday.
He expressed hatred of Jews during the rampage and later told police that "all these Jews need to die," authorities said.
Six people were injured in the attack, including four officers.
Bowers 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 neighborhood of Squirrel Hill, about 10 minutes from downtown Pittsburgh and the hub of the city's Jewish community.