By CBSNewYork Team

NEW YORK (CBSNewYork) — Police released new video of a man wanted for hitting a clerk in the head with a rock during a violent robbery in Kips Bay.

Investigators believe he is responsible for at least three other robberies in Manhattan.

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The latest incident happened just after 10:30 p.m. Wednesday at the Van Leeuwen Ice Cream on Third Avenue.

Police said the suspect placed an order, and when the clerk looked away, he hit her in the head with a large rock and demanded money.

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Police are searching for a man seen on video hitting a clerk in the head with a rock during a violent robbery in Kips Bay. (Credit: NYPD)

The 23-year-old victim suffered a concussion and cut to her head. She taken to the hospital in stable condition.

Police said the suspect also stole a woman’s purse from a restaurant in late December, took another woman’s bag from a hotel in early January, and robbed a restaurant a week later.

Anyone with information about the crime spree is asked to call the NYPD’s Crime Stoppers hotline at 1-800-577-TIPS (8477), or for Spanish, 1-888-57-PISTA (74782). You can also submit a tip via their website or on Twitter, @NYPDTips. All calls are kept confidential.

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CBSNewYork Team