Three innocent bystanders were struck when gunfire erupted outside a Washington Heights bodega over the weekend, according to cops and startling new video. 

The bullets rang out moments after three men followed a fourth into the Marte Grocery on Audubon Avenue near West 183rd Street around 11:10 p.m. Saturday, cops said.  

The fourth man ran behind the counter and is shown on surveillance video released Sunday night holding a gun, with his back to a worker.

A short time later, the group of men exchanged gunfire outside, striking a 42-year-old woman in the left arm, a 58-year-old woman in the buttocks and a 78-year-old man in the left arm and stomach, police said.

None were involved in the confrontation, which appeared to be drug-related, cops said. 

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