(CNN) -- A business jet crashed into a hangar at the Santa Monica Airport on Sunday. No one survived the crash and subsequent fire, but authorities did not immediately determine how many were on board.
The twin-engine Cessna Citation ran off the right side of the runway after landing at 6:20 p.m. Pacific Time, said Federal Aviation Administration spokesman Ian Gregor.
The hangar collapsed and was too unstable for firefighters to enter, said Captain John Nevandro of the Santa Monica Fire Department.
"It was an unsurvivable crash," Nevandro said.
Various models of the Citation jet carry from seven to nine passengers, according to the manufacturer's website.
A witness, Charles Thomson, told CNN affiliate KCAL-TV a tire on the plane appeared to burst.
"It wasn't an emergency landing," Thomson said. "It was just a landing, and the tire popped afterwards."
The plane departed from Hailey, Idaho, an area popular for vacation homes, KCAL reported.
National Transportation Safety Board investigators arrived Sunday night, but they did not expect to be able to reach the plane until Monday, KCAL reported.
CNN's Dave Alsup and Janet DiGiacomo contributed to this report.
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