All 10 people in an air taxi aircraft were killed as it crashed on take-off from an airport in Alaska.

The De Havilland DHC3 Otter was engulfed in flames just after 11am local time on Sunday in Soldotna, about 75 miles south-west of Anchorage and located on the Kenai Peninsula.

US National Transportation Safety Board investigator Clint Johnson said the pilot and nine passengers were killed.

Meagan Peters of Alaska State Troopers said the aircraft was engulfed in flames before firefighters could reach it. The victims have not yet been identified.

Initial reports indicated the accident happened as the aircraft took off, Johnson told the Associated Press.