Helicopter with five US marines on board found in mountainous area

A missing helicopter has been found (Nelvin C. Cepeda/The San Diego Union-Tribune via AP)

A missing Marine Corps helicopter with five troops on board has been found in a mountainous area outside San Diego.

The aircraft was located just after 9am on Wednesday by civil authorities near the mountain community of Pine Valley, about a 45-mile drive from San Diego, but rescue crews said snowy conditions were making access challenging on the ground.