Police were searching for up to three suspects Wednesday in connection with a mass shooting in San Bernardino, California, where as many as 20 people were wounded.
Firefighters set up a triage area near the Inland Regional Center on the South Waterman Avenue, where they were treating the wounded on the street and loading others into waiting ambulances.
Meanwhile, dozens of SWAT team officers were massing outside the facility while police were evacuating nearby buildings.
The FBI and federal ATF agents were also heading to the scene, officials said.
The first shots were fired at the center around 11 a.m. local time (2 p.m. ET), said Lt. Richard Lawhead of the San Bernardino police.
“There’s plenty of police activity,” Jim, a sales person at the nearby Structural Material Company who did not give his full name, told NBC News. “A lady ran into our bathroom and said somebody was shooting there.”