Police in the San Diego suburb of El Cajon shot and killed a black man a minute after arriving at the scene to investigate a report of mentally unstable person walking in and out of traffic.

El Cajon Police Department spokesman Lt. Rob Ransweiler said Wednesday two officers arrived at the scene at about 2:10 p.m. Tuesday. Ransweiler says the shooting happened at 2:11 p.m.

He says police received the report about the mentally unstable person at 12:57 p.m.. He says police did not immediately respond because they had other calls for service.

Police say the man refused to comply with instructions to remove a hand from his pants pocket, paced back and forth, then rapidly drew an object from the pocket, placed both hands together and extended them in a “shooting stance.”

The officers simultaneously fired a handgun and an electric stun gun.

The victim has been identified as Alfred Olango, a refugee from Uganda.