Chapel Hill police were notified of three reports of peeping toms in the past two months and have received six total reports since January.
The most recent incident occurred last week at the Delta Zeta sorority house, located at 420 Hillsborough St.
Chapel Hill police spokeswoman Jane Cousins said a man entered the sorority house and proceeded to leave feces on the kitchen floor, walls and bathroom.
Cousins said police have no suspects at this time.
Last January, the Pi Beta Phi sorority house also experienced a break-in. Laura Anderson, a house resident said she found the offender in her room.
"We actually had a guy come in the house at 4:30 a.m.," Anderson said.
A peeping tom also made his presence known on Bid Day, Aug. 29.
Lee Law, house mother of Chi Omega sorority, said a man stood outside the Chi Omega house with a video camera for at least an hour as girls ran to the houses that had given them bids and congregated on the front lawn.
Law said she told the man to leave the property, but she was told by police that his action was not illegal because he stood on the sidewalk. "It was very uncomfortable and creepy," Law said.