NUTLEY — State Police say a teenage girl was killed when she fell from an overpass onto the Garden State Parkway and was then struck by a car.

But it's not yet clear how or why the 15-year-old fell from the overpass, which authorities say has fencing. It also wasn't clear if she was alone at the time she fell.

The girl fell around 10:35 p.m. Friday and landed in the southbound lanes near milepost 151.5. She was then struck by a car traveling in the right lane.

The woman driving the car wasn't injured.

The teen's name has not been released. An autopsy was planned for Saturday.

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