Update 5:17 p.m.: The shooting has left 14 dead and 14 wounded, according to the New York Times.
Update 5:21 p.m: President Obama has responded to the attack: "We have a pattern now of mass shootings in this country that has no parallel anywhere else in the world," he told CBS News. "There are steps we can take to make Americans safer…to make these rare as opposed to normal."
On Wednesday (Dec. 2) emergency crews responded to reports of a shooting in San Bernardino, California. The city's fire department tweeted that it was "responding to reports of 20 victim shooting incident."
The number of victims is not yet confirmed, though police reports indicate it to be between 10 to 20. Police are currently looking for one to three suspects, "who were heavily armed and possibly wearing body armor," the LA Times reports.
"The gunmen were believed to be in a cluster of office buildings that include the offices of Inland Regional Services, which offers services to individuals with developmental disabilities," the New York Times reports.
The shooter(s) are still at large.
This is a developing story. MTV News will continue to update as details unfold.