NJ State Police trooper involved in serious crash on I-78

WARREN, New Jersey (WABC) -- A New Jersey State Police trooper was involved in a serious crash that trapped him in his cruiser Monday afternoon.

The crash happened on I-78 eastbound in Warren just west of Exit 40.
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The NJSP said the trooper's vehicle was heading east when it ran off the road and struck a tree.

Emergency crews had to cut the trooper out of the vehicle. He was then transported by helicopter to the hospital in serious condition. Fortunately, he is expected to survive.

PHOTOS: Crash scene after NJ trooper crashes into tree
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Both eastbound and westbound lanes of I-78 were shut down for the investigation.

It's still not clear what caused the accident.