\'Horrific crime scene\': Pittsburgh official

ROUGH CUT (NO REPORTER NARRATION) A gunman killed at least eight people and injured 12 in an attack on a Pittsburgh synagogue during Sabbath religious services on Saturday, and a suspect was in custody in a possible hate crime, local authorities and media reported.

A "bearded heavy-set white male" was in custody, KDKA television said, citing police sources saying the gunman walked into the building and yelled "All Jews must die".

Responding officers "received fire" and three officers were injured, KDKA said, but it was not immediately clear if they were counted among the 12 injured.

Pittsburgh public safety director Wendell Hissrich says the FBI is taking over the investigation.

He described the crime scene as horrific and one of the worst he's ever seen.