An accident on I-84 in Newtown Sunday night is under investigation by State Police. Troopers were notified of the accident on the westbound side of the highway near exit 10, shortly before 10pm. A driver was found unresponsive and State Police had to force entry to the vehicle to help the driver. The motorist was transported to the hospital by ambulance.  No further details about the accident have been released, but State Police are asking that anyone who may have witnessed the incident to contact Troop A in Southbury at 203-267-2200.