CHICAGO (CBS) — Emergency personnel responded to an accident involving a squad car and an ATV four-wheeler in LaGrange.

The accident happened near Washington Avenue and Calender Avenue around 3:30 p.m. Wednesday.

Police say the ATV was unlicensed and unregistered.

“I saw the man on the ground. He was bleeding,” said one witness.

“He was not wearing a helmet,” witnessed another neighbor.

Neighbor Cole Hurd says after the initial shock, the LaGrange officer tended to the rider of the ATV. Before long, the streets were shut off and state police were looking into the crash scene.

Neighbors say the ATV barreled through a stop sign and hit the squad car.

People who live in the area say it is not unusual to see riders, including the man who was injured, joy-riding vehicles like Go-Carts or ATVs, but say collisions involving them are very rare.

“The guy is going to stay in all of our prayers. Hopefully he will be fine,” said Hurd.

The condition of the ATV rider is unknown at this time.

Police are not confirming or denying the neighbor accounts of what happened.

Neighbors say the officer suffered minor injuries.