Quarterback Ben Roethlisberger and linebacker Ryan Shazier were among the Steelers players and staff members in attendance at the joint funeral of brothers Cecil and David Rosenthal, who were killed in the Tree of Life Synagogue shooting in a Pittsburgh neighborhood last weekend.
Michele Rosenthal, the sister of the two victims, previously was the Steelers' community relations manager.
More than 1,000 people poured into Rodef Shalom to mourn the two intellectually disabled brothers who were killed in the shooting. Eleven people died and several others were injured during the attack in the neighborhood of Squirrel Hill, which is a few miles from the Steelers' practice facility.
The Steelers (4-2-1) held a moment of silence before Sunday's 33-18 victory over the Cleveland Browns.
Players and fans at Heinz Field bowed their heads and stood in silence for approximately seven seconds before the contest against the Browns. The scoreboards also went dark during the moment of silence.
"On behalf of the entire Steelers organization, we offer our support and condolences to the families of the attack of peaceful citizens worshipping at the Tree of Life Synagogue," team president Art Rooney II said in a statement Sunday morning.
"Our hearts are heavy, but we must stand against anti-Semitism and hate crimes of any nature and come together to preserve our values and our community."
Defensive end Cam Heyward wore a T-shirt featuring a heart around the word "Pittsburgh" as he entered the stadium.