All 10 people aboard the Bering Air plane that crashed in Alaska on Thursday were killed, the Associated Press reported, citing the US Coast Guard.

It is unclear yet what caused the accident. The plane was traveling from Unalakleet to Nome with nine passengers and a pilot when it went missing.

NBC reported the plane’s debris were found 34 miles (55 kilometers) southeast of Nome.

This is the third serious plane crash in the US in less than two weeks. On January 31, a Learjet 55 medical flight crashed in Philadelphia, Pennsylvania. The accident killed at least 7 people and 19 others were hospitalized.

On January 29, an American Airlines jetliner and an Army Black Hawk helicopter collided near Washington, DC’s Ronald Reagan Airport, killing 67 people.