State police say a trooper was involved in a four-car crash Sunday morning on the Southern State Parkway.

Officials say troopers were responding around 5 a.m. to a two-car collision near Exit 15 that led to a DWI investigation.

While a trooper sat inside a patrol car managing traffic around the crash, another vehicle slammed into the cruiser.

Police say the driver who struck the patrol car was not impaired.

Both the trooper and driver suffered minor injuries.