DETROIT -

Police in west Michigan have issued an Amber Alert for a 15-year-old boy from Wyoming, Mich.

Joseph Lasher was last seen early Friday afternoon. Wyoming police believe he is in extreme danger.

Lasher is described as a high-functioning autistic child who has wandered away from his home.

His appearance is described as white, standing 5 feet 8 inches tall and weighing 180 pounds. He has blue eyes and brown hair.

Lasher was last seen wearing a white Aeropostale T-shirt with lime green lettering, blue jeans and white tennis shoes.

Anyone with information on his whereabouts should contact 911 or the Wyoming Police Department at 616-456-3416.