Police in Manchester, New Hampshire, say they found a cab driver dead in the driver's seat at a gas station.
Officers were called to a Shell Station on Saturday for a person slumped over the wheel.
The person was later identified as a 33-year-old man from Manchester who worked for the Red Sea Cab Company.
The state medical examiner's office was called.
Police said Monday the cause of death cannot be determined at this time, although drugs and alcohol have not been ruled out as possible factors.