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Helicopter spins out of control before deadly crash

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WARNING: Some may consider the video disturbing

CARLSBAD, Calif. -- KSWB --Two people were killed after a helicopter spun out of control and crashed at McClellan–Palomar Airport Wednesday evening, according to authorities.

The single-engine AStar helicopter appeared to be trying to land on a portable landing pad when it's tail hit the ground, a witness told FOX 5. Then, the rotors lost control causing the helicopter to spin uncontrollably.

Carlsbad firefighters were called to 2198 Palomar Airport Road in Carlsbad around 4:22 p.m. after several witnesses watched the helicopter caught fire after crashing near a hanger, Carlsbad police said.  Both people aboard the aircraft died in the crash, according to a NorCom Fire dispatcher.

The circumstances of the crash, which prompted a closure of the airport, were unclear, and the victims' identities were not released.

Weather does seem to have played a factor in the crash, according to another helicopter pilot who was at the crash site.

"The National Transportation Safety Board is en route and will conduct an investigation into the cause of the crash. We are unable to release details as to the specific type of aircraft or the identities of the passengers at this time,” according to Alex Bell of the County of San Diego.