At least 20 victims were reported Wednesday in a shooting in San Bernardino in California, with a gunman still at the scene, fire officials said.

At least 20 victims were reported Wednesday in a shooting in San Bernardino in California, with a gunman still at the scene, fire officials said.

"SBFD units responding to reports of 20 victim shooting incident in 1300 block of S. Waterman. SBPD is working to clear the scene," the city fire department said on Twitter.

Fire officials said an active shooter was at the scene in the city about an hour east of Los Angeles.