EL CAJON, Calif. — A black man reportedly acting erratically at a strip mall in suburban San Diego was shot and killed by police after pulling an object from his pocket, pointing it at officers and assuming a “shooting stance,” authorities said.

One of the officers tried and failed to subdue the unidentified man with a stun gun before the other officer fired several times, El Cajon Police Chief Jeff Davis said at a late night news conference. Davis would not say what the object was, but acknowledged it was not a weapon.