Police are attending a shooting in California, with reports of 20 victims.
The San Bernardino Fire Department tweeted that it was responding to a "20 victim shooting incident" and it was working to clear the scene.
It is still a "very active scene" and police are trying to secure the building, said a spokeswoman from the San Bernardino Police Department.
There may be up to three gunmen she said, and the shooters were heavily armed and possibly wearing body armour.
She did not confirm the number of victims.
A local reporter tweeted that people are being evacuated from the Inland Regional Center, a non-profit medical and health organisation.
People are being seen wheeled away on stretchers with medics and police officers in attendance.
Representatives from the FBI and the Federal Bureau of Alcohol, Tobacco and Firearms are on the scene.
No arrests have been made yet.
An ABC affiliate tweeted that there are 12 fatalities, but police have not confirmed that number.
Another mass shooting in the US, breaking news so details are a bit sketchy. I'll update the OP as more becomes available.
3 shooters wearing body armour really seems to point at some kind of terrorism type event in my mind but this is all super early stuff.
What the hell is going on over there?
