A gunman has entered a synagogue in the US city of Pittsburgh, Pennsylvania, and opened fire, police report.
Emergency services arrived at the Tree of Life Congregation Synagogue at about 10:00 local time (14:00 GMT), according to reports.
There are multiple casualties, a spokesman for the Pittsburgh police department said.
A service was taking place at the time, according to the synagogue’s official website.
“There are multiple casualties, it is imperative people stay in their houses and shelter in place,” police spokesman Jason Lando said.
Footage posted on social media showed a heavy police presence in Pittsburgh’s Squirrel Hill neighbourhood.
The Pittsburgh Public Safety Department later posted a tweet advising people to avoid the area.
According to police radio, the gunman has now surrendered.