As many as 20 people have been wounded in the shooting, the broadcaster reports. At the same time, ABCnews reports 12 dead.
The police is searching for the shooters. The details of the incident are being investigated.
Photo - NBC
San Bernandino PD confirmed at least one of the suspects was wearing tactical gear, MSNBC TV reports.
As noted, the shooters were possibly heavily armed and wearing body armor.
According to unconfirmed reports, the suspects could escape the scene in a black SUV.
According to the latest data, some 12 to 20 people died in the shooting. The area has been cordoned off, evacuation is underway.