A man was arrested for sexual assault after a woman was molested as she tried to use the bank machine Tuesday.

The incident happened around 12:20 p.m. at the Bank of Montreal on Wyndham Street. A woman went in to use the bank machine and a man followed and rubbed himself against her buttocks, a news release said. The woman was alarmed, but thought maybe the action was a mistake, until the man pushed himself up against her rear again and began to fondle himself, it said.

The woman went into the bank for help, and police came and arrested the man. A search found him in possession of a small quantity of marijuana. A 29-year-old Guelph man is charged with sexual assault and possession of a controlled substance.