By Christin Ayers

HAYWARD (CBS SF) — People in Hayward may see police running around into the night at Southland Mall as the FBI held a drill.

Police cruisers, SWAT vehicles, and ambulances were scattered across the mall’s parking lot Thursday night as law enforcement agencies practiced exercises inside.

The drill simulated a shooting, or terrorist attack inside the mall.

The drill was expected to last until 3 a.m.