The Oklahoma Highway Patrol is assisting Stroud Police Department in the search for 7-year-old Austin Cornett.
Officers say Austin was picked up from school in Stroud Monday afternoon by a noncustodial parent, Sarah Hill.
He was last seen wearing gray shorts and an orange Nike T-shirt.
Police believe Sarah is driving a 2007 maroon Mazda CX7 with Oklahoma tags EKP237.
If you have any information, please call Stroud police at 918-968-2733.