Two US Marine helicopters collided with each other and crashed off the north shore of Oahu island in Hawaii late Thursday, local media reported on Friday.
The accident was initially reported at 10.40 p.m. on Thursday and the two helicopters had a total of 12 people on board, local media quoted sources with the US Coast Guard as saying.
The Coast Guard and the Honolulu Fire Department have started searching for survivors at the scene of the crash.
