State Police are investigating a fatal motorcycle accident that happened in Southbury on Friday evening. Police say a dump truck traveling eastbound on Kettletown Road and a motorcycle headed south on Route 67 collided at the intersection. The crossing is not far from I-84. 52-year old Mark Kibby of North Granby was ejected from the motorcycle and transported to St Mary's Hospital with serious life-threatening injuries. He was later pronounced dead. A 52-year-old Holmes, New York man, the driver of the dump truck, was not injured.