Updated

Philadelphia police say a pair of thieves made off with some expensive jewelry but left behind a 4-year-old boy.

Police say a man and woman entered the Platinum & Ice Jewelry store on South Street with the child at about 3 p.m. Saturday. They asked to see some rings and then grabbed a tray of items valued at more than $100,000 and ran out.

Capt. Laurence Nodiff says the couple dragged the child by the hand for 2 1/2 blocks before the clerk caught up with them, and the man slashed the clerk's face and neck. The couple then fled, abandoning the child.

Detectives say they are unsure whether the boy is the couple's child. He was placed in the custody of the Department of Human Services.