Police in San Bernardino, California are responding to reports of an active gunman at a social services facility.
Lt. Rich Lawhead said there are reports of multiple victims.
The call came in around 11 a.m. in the 1300 block of South Waterman Avenue at the Inland Region Center, according to KTLA 5.
At least 20 victims have been reported down, but officials say there might be more. The extent of their injuries was not immediately known.
Officials say police are working to secure the scene in the inland region just east of Los Angeles and a SWAT team is in the area.
Check back for updates.
