An elderly Monroe County woman was killed in a three-vehicle crash that occurred at 9:43 a.m. on Monday.

Scott M. Grim, Lehigh County coroner, identified the victim as Jean Singlemann, 78, of 5065 Reservoir Road in East Stroudsburg. Grim said she died at 3:19 p.m. at the Lehigh Valley Hospital-Cedar Crest, where she was flown by medical helicopter. An autopsy was scheduled for this morning to determine the exact cause of death.Singlemann was a rear-seat passenger in a vehicle that was struck by a tractor-trailer rig at the intersection of Route 209 and Shafers Schoolhouse Road in Stroud Township. The truck hit the rear of the car in which Singlemann was a passenger.Five people were injured in the accident.A representativefor Stroud Regional police said the investigation is continuing and a state police accident reconstruction unit has been called to assist.No other information concerning the crash was available this morning from police, including the names of the others involved.