LAVAL, Que. - A three-year-old autistic boy who is also deaf and mute has gone missing in Laval, Que.

The boy was playing by a road near a wooded area in the Montreal suburb Sunday afternoon when his caretaker lost sight of him.

Police say they are particularly concerned because he went missing close to a river.

They have been patrolling the water by boat looking for him.

The boy has dark hair and was wearing a black jacket, blue jeans and a striped toque.