An Amber Alert has been issued for a 9-year-old boy from Gennesee County who has severe autism.

Omarion Humphrey, from Davison, is a 4-foot-tall black male, and weighs 70 lbs, according to

Omarion has black hair and was last seen wearing black shorts with a red stripe and no shirt. He was last seen around 5:45 p.m. Saturday in Davison.

The Davison Township Parks and Reaction Department announced on its Facebook page that the Lake Callis Recreation Complex would be closed Sunday to "facilitate additional search efforts" in locating the missing boy.

Crews searched overnight for the boy and are continuing to look for him.

The boy is unable to speak, but will respond to his nickname "Mars".

Anyone with information is asked to call 810-732-4720 or 911.