The NYPD shared a surveillance image of the suspect.
Police are looking for a man they say walked up to a 39-year-old woman on a Queens subway over the weekend and punched her in the face, breaking her jaw.
It wasn't clear what prompted the attack aboard the southbound 7 train, near the Hunters Point Avenue station, around 2 a.m. Sunday.
Cops didn't describe any exchange between the two prior to the attack.
The victim was taken to a hospital for treatment afterward. The suspect ran off.
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Police released a photo of him (above). Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.
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