The OPP is asking for the public’s help following a serious crash involving a 29-year-old motorcyclist on Highway 401 early Friday morning.

According to police, the collision occurred just before 2 a.m. in the eastbound lanes near Kingston Road. The motorcyclist crashed into the rear of a tractor-trailer and suffered serious injuries.

Witnesses reported seeing two motorcycles traveling at high speed prior to the crash. The second rider did not remain at the scene.

While no charges have been announced, anyone with information is urged to contact Toronto OPP at 416-235-4981.