An officer was killed and another wounded while responding to a report of a man shooting rounds with a rifle and a wounded and unresponsive man lying on the sidewalk in a city east of Los Angeles, authorities said Sunday. When the officers arrived to the scene Saturday night, they were "met by gunfire," and at least one officer returned fire, Los Angeles Sheriff Robert Luna said.

An adult male suspect was wounded but has been taken into custody, the Los Angeles Sheriff's Department said. The man, who has not been identified, was taken to a hospital and was in stable condition Sunday, the department said in a statement.

Officials on Sunday identified the slain officer as Samuel Riveros. The man found wounded on the sidewalk was taken to a hospital, where he died. His identity is being withheld pending next of kin notification, the Los Angeles County Sheriff's Department said.