NEW YORK (CBSNewYork) — Police late Sunday were searching for an assailant who knocked down, beat and robbed a 66-year-old man on an M Train in Bushwick, Brooklyn.

Around midnight Saturday night, the victim was on a Manhattan-bound M Train at the Myrtle-Wyckoff Avenues station when the suspect came up and knocked him to the floor, police said.

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The suspect then kicked and punched the man before taking his wallet and cellphone, police said. Among the items in the man’s wallet were a credit card and $20 in cash, police said.

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The man suffered cuts to his face and a broken rib, and was taken to an area hospital in serious, but stable condition, police said.

The suspect was described as a black male between 20 and 25 years old, standing 5 feet 8 inches tall and weighing about 175 pounds. He was last seen wearing a black hooded sweater, blue jeans and black and gray sneakers.

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Anyone with information was asked to call the NYPD Crime Stoppers at (800) 577-TIPS or (888) 57-PISTA for Spanish, log onto the Crime Stoppers website, or text tips to 274637 (CRIMES) and enter TIP577.