Crews in Alaska are searching for a plane that went missing with 10 people on board while over Norton Sound off Nome.

The Cessna Caravan left Unalakleet at 2:37 p.m., and officials lost contact with it less than an hour later, according to David Olson, director of operations for Bering Air. The aircraft was 12 miles (19 kilometers) offshore, according to the U.S. Coast Guard.

Rescue operations are underway Friday after a small plane with 10 people went missing over Alaska’s Norton Sound shoreline — an inlet of the Bering Sea. The aircraft owned by Bering Air Caravan