Halloween in Cleveland is a whole lot scarier with a serial killer on the loose. Cleveland police are now on the hunt for 50-year-old Anthony Sowell after the remains of as many as six people were found at the registered sex offenders home.

He is wanted in connection for an alleged attack on a woman in his home in September. When police arrived at the home on Thursday with a search warrant, they found two bodies on the third floor. Because the bodies were in advanced stages of decomposition, the bodies have not yet been identified and their genders not yet determined.

Friday afternoon a third body was uncovered Friday afternoon in a shallow grave in the basement of the home. Cadaver dogs uncovered additional shallow graves in the home's backyard. Investigators say they plan to continue searching the home for more evidence.

Sowell remains at large and on the run. He is considered to be extremely dangerous. He is 6 feet tall and 155 pounds. He wears eyeglasses and frequently sports a mustache. He does not drive a car, and is known to collect and cash in scrap metal. He spent 15 years in prison for a rape dating back to 1989.

Anyone with information on Sowell's whereabouts is asked to contact US Marshals Service Fugitive hotline at 1-866-4-WANTED.