NEW YORK (CBSNewYork) — Police are looking for a suspect who punched a female Metropolitan Transportation Authority worker in the face.

(Photo: NYPD)

Surveillance video shows a man leaving the Park Avenue subway station in Brooklyn after Saturday’s attack.

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Police said the assault was unprovoked, and that the man just walked up to the 38-year-old train conductor and punched her while passengers were boarding an M train.

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The victim suffered bruises to her face, but is okay, police said.

The suspect is said to be between 20 and 30 years of age.

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