FAIRFIELD — A Fairfield University student said he was groped by a man who offered him a ride back to campus Saturday night.

The 19-year-old man, who lives in Bronx, N.Y., told campus security he was walking up the Post Road around 11 p.m., when an older white man in his mid-50’s with gray hair offered to give him a ride to the college. He was driving a gray, two-door convertible.

At one point, the student said, the man reached over and put his hand on the student’s crotch. When the car stopped at Barlow and Round Hill roads, the college student said he jumped out of the car and ran to the campus. He immediately reported the incident to security, who called police.

The 19-year-old told police he had never seen the man before.