It happened around 1:20 a.m. near the intersection of 24th Street and Lehigh Avenue.
Police said a man was pushing a woman in a wheelchair when 4 to 5 youths approached and fired roman candles toward them.
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One of the fireworks struck the woman in the leg causing a small burn.
Police chased the group of suspects a short distance from the scene but the youths got away.
Police continue to investigate the incident.