Justin Lee, 22, is charged with endangering the welfare of a child and harassment.
Police say a 13-year-old girl was followed into her apartment building on Friday near Ocean Parkway and Ditmas Avenue.
Investigators say she was grabbed by the neck and pushed underneath a staircase. She was not seriously injured, police said.
A few hours later, the same man allegedly tried to assault a 15-year-old girl in that same area. There is no word on her condition.
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