California police are investigating a report of a possible child abduction on Halloween night.

Oakland police say two trick or treaters witnessed a child wearing a costume being yanked off a bicycle and forced into a van. The incident is being investigated as a possible kidnapping.

The Associated Press

Police have recovered the bicycle.

Investigaters are unsure whether the child was a boy or girl and say no one has been reported missing.

Police haven't ruled out a Halloween prank or an upset parent.