DELAWARE, Ohio (AP) — Authorities say two motorcycles have collided while escorting first lady Michelle Obama from a campaign stop in central Ohio, injuring a police officer and a state trooper.

The State Highway Patrol says the motorcycles somehow side-swiped each other late Monday afternoon east of Delaware as the motorcade headed to an airport.

A state trooper and a Genoa Township police officer were hurt in the crash. They were hospitalized in Columbus in stable condition. The patrol says the police officer's injuries were more serious than the trooper's but were not life-threatening.

Mrs. Obama wasn't hurt, and her motorcade continued on its route. She had campaigned at nearby Ohio Wesleyan University and was headed to Cleveland for another event.

No other vehicles were involved in the crash.