Saco police are investigating a crash that sent a man riding a mini-bike to the hospital with serious injuries Tuesday.

Alex Paul, 21 of Biddeford was riding a motorized bike, smaller then 50 cc, on Willey Road, which is a dead end, when he collided head on with a 1996 Jetta driven by Brandon Williams, 24 of Biddeford. The collision, at 6:49 p.m., threw Paul into the windshield and he was taken to Maine Medical Center with serious but not life-threateneing injuries, police said.

Williams was given a blood alcohol test as is required in such cases but neither alcohol nor excessive speed appear to be factors in the case, police said.

The crash occurred near the cul de sac and an accident reconstruction will attempt to determine the speed and location of the vehicles at the time of the crash, police said.