Three motorcyclists are dead in a series of accidents which began when one rider crossed the centre line on a curve on Highway 507 in the Kawartha Lakes township of Trent Lakes, OPP report. A fourth person is in hospital with grievous injuries. Police say Greg Campbell, 43, from Toronto, Mark Langhorne, 40, from Oshawa, and Scott Knill, 45, from Woodville, a village west of Lindsay, all died. Campbell and Langhorne were part of Nasty North Ryderz Evolution, a Toronto motorcycle club. OPP say one of the riders in a group of 11 northbound motorcycles crossed the center line on a winding portion of the road and collided with two southbound motorcycles which were part of a group of three. Soon after that, another northbound motorcyclist hit a car that had stopped at the scene and another northbound motorcyclist went off the roadway and into the ditch.