Investigators say five people have died in the crash of a small plane in the southwestern Colorado mountains.

National Transportation Safety Board spokesman Peter Knudson says no one survived when the twin-engine Cessna 310 went down at 4:15 p.m. Sunday.

The victims' names and hometowns haven't been released. There was no immediate word on the cause.

Knudson could not say whether it was the same Cessna 310 reported overdue on a flight from Barstow, California, to Amarillo, Texas.

The plane crashed north of Silverton in the San Juan Mountains. A search and rescue team from the San Juan County Sheriff's Department was at the scene and an NTSB investigator was on the way.

Knudson said a helicopter might be required to reach the remote crash site.