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Cops are looking for a man who inappropriately made contact with a woman and struck her in the head on the 4 train in Manhattan last week.

The NYPD released pictures on Sunday of the suspect wanted for the attack, which occurred at 7:50 a.m. on March 10 near the 14th Street-Union Square station.

According to police reports, the man “rubbed himself” against the 32-year-old victim on a southbound 4 train. The victim attempted to move away from the man, but he proceeded to hit her in the back of the head.

After confronting him, the victim exited the train at 14 Street/Union Square station while her attacker stayed onboard. She suffered a concussion as a result of the man’s actions.

The incident was reported to the 13th Precinct and NYPD Transit Bureau.

Cops described the suspect a white man in his 40s who was last seen wearing a blue shirt, a gray jacket, dark-colored pants and dark-colored shoes.

Anyone with information pertaining to the incident is asked to call the NYPD’s Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). All calls are confidential. Tips can also be sent via the CrimeStoppers website at www.nypdcrimestoppers.com or on Twitter @NYPDTips.

There already had been 401 crimes reported in the 13th Precinct, which serves the East Side of Manhattan, through March 8. That’s a 40.9% increase from last year at this time, according to NYPD composite statistics.