Authorities are trying to identify a young boy left inside a store by a suspected shoplifter who fled the store when confronted by a store security officer, police said Wednesday.

The boy, who is about 2 or 3 years old, is apparently unable to identify himself, and no one has reported him missing, Sgt. Gary Knight said.

The boy has been in Department of Human Services custody since Friday, when he was left inside the Wal-Mart store on west Reno.

A man was pushing a shopping cart with the boy in it when security personnel spotted the man shoplifting and confronted him, Knight said. The man then fled the store, leaving the boy behind.