MOSBY, Mo. (AP) — A medical helicopter crashed in northwestern Missouri late Friday near a small airport where it planned to stop for fuel, killing all four people on board, authorities said.

The Eurocopter AS-350 was carrying three crew members and a patient when it went down at about 7 p.m. in a field a mile north of Midwest National Air Center, Federal Aviation Administration spokesman Lynn Lunsford said. The airport is located near the small Clay County community of Mosby, about 20 miles northeast of Kansas City.

Read more from KSCW TV: Four Killed in Northland Air Ambulance Crash