WEST SPARTA An Erie County man was pronounced dead at a local hospital Tuesday following a motor vehicle crash.

Authorities believe a medical condition led to the single-vehicle accident on Interstate 390 in the town of West Sparta.

The Livingston County Sheriff's Office identified the deceased as David C. Cash, 64, of Orchard Park.

The Livingston County HAZMAT team was called to the scene, but a substance in a five-gallon bucket that had originally sparked some concern was quickly identified as non-threatening and no further action was needed, the sheriff's office said.

Sheriff's authorities said the accident took place shortly after 11 a.m., in the southbound lane of I-390 in West Sparta. After the vehicle crashed into a highway median, responders found an unresponsive driver slumped over the steering wheel.

Livingston County Sheriff's Office Sgt. Michael Dougherty said Cash was taken to Noyes Memorial Hospital in Dansville, where he was pronounced dead.

Dougherty said accident investigators believe Cash had a "medical issue" as he drove his vehicle, leading to the highway accident.

In addition to sheriff's office deputies and investigators, emergency responders included the West Sparta Fire Department, the Dansville Fire Department.