Police released a sketch of the suspect wanted in the pattern of assaults in the area.
Most recently, an 18-year-old woman was groped near a subway station in Sunset Park Monday night, but at this point, police do not believe it is part of the ongoing pattern.
The victims are usually targeted after they get out of a subway tunnel, and they are usually petite women wearing skirts. In most instances, the attack happens before they enter a building.
The latest assault happened around 8 p.m. and came just hours after a 20-year-old woman was assaulted in Windsor Terrace.
A relative says the victim is safe, but has lost her peace of mind.
"I'm just happy she's not raped and we're not looking for a dead body," the relative said. "She was grabbed from behind, on her breasts, pulled backwards. She screamed. Apparently people came to their windows, made some noises, and he ran."
The Windsor Terrace incident is part of the pattern of attacks that started March 20. That first assault, in Park Slope, was caught by a surveillance camera.
The suspect in the Windsor Terrace attack is described as Hispanic man, about 5-foot-4 to 5-foot-6. That brief description matches that of the attackers in the prior cases.
Earlier Monday, police say a man groped a woman walking on Vanderbilt Street just hours after another victim was sexually assaulted outside a church.
"They are doing an awful lot, a lot of canvassing is going on," NYPD Commissioner Ray Kelly said. "They are actually showing videos to the witnesses, taking out laptop computers, showing it in places such as central booking, where arrests are being processed."
The assaults have inspired Take Back the Community marches in Park Slope, Sunset Park and Greenwood Heights.