A small plane slammed into a hangar at the Santa Monica Airport on Sunday evening, sparking an explosion and likely killing the passengers. Officials do not know yet how many were aboard the eight-seater plane, NBC's Mike Taibbi reports.

A multimillion dollar private jet crashed into a hangar at a California airport creating an “unsurvivable” inferno on the ground, a fire official said.

The twin-engine Cessna Citation ran off the end of the runway while landing at Santa Monica Airport at 6:20 p.m. local time (9:20 p.m. ET) Sunday. Such aircraft cost at least $3 million.

Ringo H.W. Chiu / AP Firefighters work near a collapsed hangar at the site of a plane crash in Santa Monica, Calif., on Sunday.

There was no immediate information on the number of passengers or their conditions, Federal Aviation Administration spokesman Ian Gregor said.

Santa Monica Fire Department Captain John Nevandro told NBC Los Angeles that the crash was "unsurvivable.” He added: "The building actually collapsed and wrapped itself around the plane."

Though the coroner’s office also had not identified any victims of the crash, Morley Builders issued a statement that said its president and his son were likely on board.

“While we do not have specific facts, we believe that our President and CEO, Mark Benjamin, and his son, Luke Benjamin, a Senior Project Engineer with us were on board,” said the statement from Charles Muttillo, vice president of the construction company. “We are unable to issue a further statement at this time”

Gregor said a crane would be required to lift the collapsed hangar from the aircraft and that firefighters would not be able to get to the wreckage until later on Monday.

The plane had taken off from Hailey, Idaho, just over an hour before the incident.

The Idaho airport serves the town of Sun Valley and the Sun Valley alpine region, which is known for its world-class skiing.

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