A Bronx teen allegedly sexually assaulted four women in a four-hour span in Brooklyn, police say.

They arrested Dennis Ofuamo, 19, and accuse him of attempting to rape each of the women overnight between July 12 and 13. Charges against him include burglary, sex abuse and harassment.

Police say the first attack happened at 11:45 p.m. Ofuamo allegedly followed a victim as she walked toward her apartment, placed a hand over her mouth, touched her inappropriately and told her he wanted sex.

Three other similar incidents followed. They were reported near St. Marks and New York avenues, and Albany Avenue and Sterling Place and finally near Pacific and Nostrand avenues.

In each of the attacks, police say the victims were able to fight their way free and escape.