A 53-year-old North St. Paul man died Friday of injuries suffered the day before when the motorcycle he was riding crashed into a truck in Roseville, police said.

Jerry L. LaPlante died at Hennepin County Medical Center in Minneapolis about 8 p.m., according to Roseville police Lt. Lorne Rosand.

LaPlante was severely injured in the crash, which left him unconscious and severed his left leg below the knee, Rosand said. LaPlante was not wearing a helmet, police said.

The crash happened about 5:40 p.m. Thursday at County Road C and Prior Avenue. According to witness accounts, LaPlante was eastbound on County Road C when he entered the intersection on a red light and hit the truck as it was turning into a business from the westbound lanes, Rosand said.

The truck's driver, a 39-year-old man from Eden Prairie, was not hurt and cooperated with police.