HONOLULU (AP) — An official says at least three U.S. Coast Guard crewmembers were killed when their helicopter crashed in waters about five miles south of Honolulu, and another crewmember is missing.

Spokesman Lt. John Titchen says the search continues Friday for the remaining crewmember. He says the Coast Guard release the names or ranks of the dead crewmembers for another day.

The helicopter crashed at 8:15 p.m. Thursday as the crew was conducting search and rescue drills with a 47-foot motor lifeboat.