A dump truck has rolled down an embankment off Route 7 and into the Housatonic River in New Milford. The accident happened at the intersection of Kent Road and Cedar Hill Road shortly after 9am. Police say the driver of the car involved was killed. Police have been diverting traffic near Squash Hollow and Cedar Hill roads. The truck was about 100 feet into the river and the driver waded to shore. The dump truck driver was transported to the hospital for treatment of injuries. Some fuel from the truck spilled into the river and the state Department of Energy and Environmental Protection was called to the scene.