EAST WINDSOR — Authorities say a missing woman who was found trapped in the wreckage of her car in East Windsor has died.

State police in a helicopter spotted the wreck in a wooded area off Etra Road Tuesday.

The woman was alive when she was flown to a hospital, where she died Wednesday night.

Police believe the woman drove off the road, traveled three-quarters of a mile across a field and crashed into a tree.

Police say a "pre-existing medical condition'' may have contributed to the crash.

Her name has not been released because family members have not been notified.