It happened around 5:30 p.m. on August 12 on the 500 block of Washington Avenue.
Police say a group of males were captured on surveillance video when one of them approached the New Dragon City restaurant.
Suspects sought in Philadelphia restaurant explosion
While the others gathered on a corner, police say one suspect lit an explosive device, threw it inside of the restaurant, and it exploded.
The suspects then ran east on Washington Avenue then north on 5th Street.
Anyone with information is asked call South Detective Division at 215-686-3013/3014.
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