The first incident was reported on June 18 around 11 p.m. in the 900-block of Hamlin Street, police said.
A naked man was looking through the back windows of a house, victims told police. The victims said the same situation happened the week before.
Four days later, a naked man was peeping into a house around 10:40 p.m. in the 2000-block of Pratt Court.
Around the same time, the suspect groped a victim, according to police.
The man is described to be in his 30s, about five-foot-ten, with medium build and brown hair.
Anyone with information is urged to contact police.