A search is underway in northwest Alaska for a plane that went missing with 10 people on board, officials say. The Bering Air flight was carrying nine passengers and a pilot from Unalakleet to Nome when it went missing,

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.

A plane carrying 10 people over Alaska went missing on Thursday, and crews are still searching for the aircraft. Here's what to know.