LONDON (AP) ― London police said Tuesday they have arrested a man on suspicion of fraud after he allegedly duped an American woman into handing over tens of thousands of dollars for an investment related to the upcoming Olympics.

The online scam involved an alleged contract to supply buses for police officers for the games, police said.

The fraudster, 24, first contacted the 69-year-old woman on an online dating website. Police said that once he befriended her, he tricked her into handing over $220,000 as an “initial” investment into the business.