BIDDEFORD - Police have charged a 15-year-old boy who they said exposed himself to a 7-year-old boy in a bathroom at Wal-Mart last week.

Biddeford police said someone recognized the teen from a store surveillance photo and led them to him.

He has been charged with felony attempted unlawful sexual contact.

Police said the younger boy told them that he was in a bathroom stall when a man stood in the doorway, blocking him from leaving. He told police he was able to escape by crawling beneath a partition.

The 15-year-old is being held at a secure facility until his next court appearance, according to police.