An Amber Alert (search) has been issued for a 4-year-old boy and his mother who police say may have been abducted at a highway rest stop in Clinton County.

Kyle Brady, 4, and Nicola Lee Hubert, 28, of Walled Lake, last were seen Sunday at about 10:30 p.m. in a black 2000 GMC Jimmy (search) in a rest area in Clinton County on the eastbound side of Interstate 96 near mile marker 89, said Michigan State Police (search) officials. The rear windows of the vehicle are tinted and there is damage to the rear bumper.

Click here for the Amber Alert.

There was no update on the search Monday afternoon, police said.

Kyle is described as being Hispanic, about 4 feet tall and weighs 80 pounds. He has brown hair and brown eyes. Hubert is about 5-foot-5 and weighs about 185 pounds.

Officers at the Michigan State Police's Metro North post say it is unclear who may have abducted them.

Anyone with information on their whereabouts is asked to either dial 911 or call (248) 584-5740.