(Augusta, Me.) - Maine State Police are investigating the cause of a Sunday afternoon collision that claimed the lives of two motorcyclists.

Maine SP photo

The motorcyclist were among several thousand taking part in the annual United Bikers Toy Run, which had just started at the nearby Augusta Civic Center.

Four motorcycles collided with a pickup truck on I-95 Northbound between exits 112 and 113 just after noon. The truck went off the roadway and flipped onto its side.

One motorcyclist died at the scene and a second died a short time later.

Two other motorcyclists and the two occupants of the truck were taken to the hospital for non-life threatening injuries.