Police have arrested a 22-year-old man they said attacked two teenage girls in adjoining buildings on a Brooklyn street within a six-hour spree, police said Saturday.

Justin Lee was nabbed in the same area at around 2 a.m. and is facing charges of harassment and endangering the welfare of a child for the back-to-back attacks.

The alleged spree began when Lee, wearing a “Mario Kart” T-shirt, allegedly grabbed a 13-year-old girl about to enter her building on Ocean Parkway and Ditmas Ave. in Kensington at around 1 p.m. Friday.

Lee grabbed the young girl by the neck and pushed her forward before he ran off. His victim was not seriously harmed, police said.

Lee allegedly struck again just before 7 p.m. when cops said he accosted a 16-year-old girl in another building on Ocean Parkway n

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