The Greene County medical examiner says two Walmart employees who were found dead in a car last Friday died from carbon monoxide poisoning.
Authorities say Austin Holt, 21, and Bethany Weems, 26, were sitting in the car while on a break and fell asleep.
The car had an exhaust leak.
Their deaths have been ruled an accident.
They were found in the employee parking lot behind the Walmart Supercenter on South Campbell.