BILLINGS, Mont. (AP) — A small airplane carrying mail crashed into a building early Friday in a fiery explosion, killing the pilot, officials said. No one on the ground was injured.

The plane had just taken off from Billings Logan International Airport when it crashed into a construction materials building at 1:25 a.m., Federal Aviation Administration spokesman Mike Fergus said.

"I just watched the light come out of the sky," witness Mike Krause told The Billings Gazette. "To me it looked like the plane was upside down. And then it just came straight down into the lot."

The plane appeared to hit the ground in the lot of a rental business and skid into the construction materials building, witnesses said. Fire officials confirmed the pilot's body was found in the wreckage. A representative of the company that operated the flight, Alpine Air Express, identified the pilot as Kelly Lynch of Billings.