A plane registered to a Montana oil-and-gas exploration company crashed and burned near this northwest Washington town Thursday, killing all three people on board, federal officials said.

Federal Aviation Administration spokesman Allen Kenitzer said the plane, a Beechcraft Bonanza, was on a flight from Havre, Mont., where it was registered to Textana Inc.

The plane was approaching to land at the Skagit Regional Airport when it dropped off radar about 11 a.m. The wreckage was found about 1 p.m., mostly consumed by flames, the Skagit County sheriff's office said.

The National Transportation Safety Board was investigating.