The crash is near Exit 3 for Route 7, according to state police.
The left lane was closed on the eastbound side, and the left and center lanes were closed on the westbound side, state police said. Traffic was backed up for 2 miles in each direction, according to the state Department of Transportation.
Injuries were reported in the rollover crash,which occurred at about 8:45 p.m., state police said.
Drivers were advised to reduce speed as they approach the area, state police said.
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