The shooting happened near MLK Drive and Oak Street around 6 p.m.
The child was struck in the ankle and officers recovered at least two guns from the scene.
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The 12-year-old was treated for non-life-threatening injuries.
Police are still investigating what led to the shooting.
The incident comes one day after a 17-year-old girl was shot and killed in Jersey City. The victim, Tyeah Garner, was shot in the upper body Monday night.
The shootings happened as the recent spike in gun violence in New York City shows no sign of ending.
RELATED | Shootings spike: Yet another gun violence death in NYC as surge persists
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