BEND, Ore. (AP) — A 38-year-old firefighter from Oregon and his twin brother died in a small plane crash Monday, according to Bend Fire & Rescue.

Daniel Harro was flying with his twin brother Mark near Yellow Pine, Idaho, when their plane crashed, fire officials said in written statement.

The brothers were returning to Bend from a backcountry plane camping trip near McCall, Idaho.

Daniel Harro was flying the plane and was an avid flight enthusiast, officials said.

The cause of the crash is unknown and under investigation by local authorities, fire officials said.

Harro had been with Bend Fire since 2014 as a firefighter and paramedic after previously working for the Scappoose Fire Department in Oregon, officials said.

Bend Fire Chief Todd Riley said Harro was well-loved and well-respected by everyone who worked with him.