A man was injured Thursday afternoon when his motorcycle collided with a farm tractor.

At approximately 4:10 p.m., a farm tractor, driven by Keith Rath of Savanna, was making a left turn onto a private drive on Elizabeth road, north of Mount Carroll when a motorcycle driven by Loran Hoffman of Clinton, Iowa, struck the tractor while attempting to pass in a no-passing zone.

Hoffman was thrown from the motorcycle and was transported by helicopter to OSF St. Anthony in Rockford. His condition is unknown at this time.

Rath was uninjured. 

The accident is under investigation by the Caroll County Sheriff and the Illinois State Police.