All three incidets occurred near the intersection of Flatbush Avenue and Bedford Avenue in the Flatbush section of Brooklyn.
The first attack took place back on April 13, when the man sexually assaulted a woman after following her back to her apartment, police said.
He struck again in May and most recently on Friday, Dec. 10. In both cases, he forced his way into his victims' apartments and raped them.
All of the attacks took place between 10:30 p.m. and 2 a.m, police said.