ROCHESTER, Minn. – A 70-yer-old Rochester man on a motorcycle was injured seriously when, police said, a van crossed his path. The motorcyclist, whose name Sheriff Kevin Torgerson declined to release immediately, suffered injuries to his head, arms and legs. He was not wearing a helmet, deputies said. The accident was about 3:45 p.m. at 40th Street and 18th Avenue in a rural area southwest of Rochester. The van driver, from LeRoy, age 26, was unhurt. The sheriff declined to release his name immediately.