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MEHLVILLE, MO (KTVI)- A Waterloo, IL woman was found dead inside her car Sunday morning after she drove off I-255 near the Jefferson Barracks Bridge sometime overnight.

Lorraine Clark, 81, was last seen around 7:00pm Saturday. Her car was found around 5:45am Sunday just off the highway, east of Koch Road near the river. According to the Missouri Highway Patrol, Clark was traveling east in the westbound lanes when her car ran off the road, struck a fence, and became airborne.

It is unclear when the crash happened. Missouri Highway Patrol is investigating the crash.