After a pursuit and crash near Diamond Street and Figueroa Street Wednesday afternoon, two suspects got out of their car and ran down a ramp before entering the Promenade Towers apartment complex, police say.
One person was taken into custody but a second suspect remains on the loose.
At one point, dozens of LAPD officers surrounded the building and set up a perimeter within a three-mile radius from the complex, as they went door-to-door inside trying to locate the second suspect, who they believed was armed.
Officials say officers were initially chasing the suspects for speeding, and later learned they were driving a stolen car.
A description of the second suspect was not available.
No further details were immediately known. The investigation is ongoing. Anyone with information regarding this case is urged to contact LAPD.