Armed robbers hit a Dunkin' Donuts; one suspect was shot dead by a customer, the other fled.

Police are investigating a shooting that occurred behind a Dunkin' Donuts in Northeast Philadelphia on Tuesday morning. Two armed men robbed the store and customers; one was shot and killed by an armed customer outside, while the other escaped. The deceased was identified as one of the suspects. The investigation is ongoing, and no arrests have been made yet.