( CNN ) -- Investigators discovered four more bodies Tuesday at the Cleveland , Ohio , home of a convicted rapist -- making a total of 10 since last week , Police Chief Michael McGrath said Tuesday . Authorities on Tuesday charged Anthony Sowell with five counts of aggravated murder after unearthing the bodies of women at his home last week , police said . Sowell , 50 , also was charged with rape , felonious assault and kidnapping , police said . His arraignment is scheduled for Wednesday morning . Police arrested Sowell on Saturday , two days after discovering the decomposing bodies of five females inside his home and another woman 's body outside the house . Earlier Tuesday , a source close to the investigation had told CNN that a seventh body had been found in the home . The source , who was not authorized to speak on the record , did not reveal the gender of the seventh body found at Sowell 's home . The source did not say exactly where the body was found at the residence . Authorities found the first two bodies last week while trying to serve an arrest and search warrant on Sowell related to a sexual assault investigation , and an intensive search began . Sowell was not home at the time ; officers found him after a tipster told them of his whereabouts . The decomposing bodies of the first six women , all of whom were African-American , could have been lying where they were found for `` weeks , if not months or years , '' Cuyahoga County Coroner Frank Miller III told CNN on Saturday . All six deaths were ruled homicides , Lt. Thomas Stacho of the Cleveland Police Department said Monday , with five of the deaths due to strangulation . About a month ago , a woman accused Sowell of rape and felonious assault , Stacho noted last week . Investigators obtained the warrants that set off the search after the `` cooperation of the victim , '' he said . Officers serving the warrants Thursday discovered the badly decomposed remains of two bodies on the third floor of the house , he added . A subsequent search revealed what appeared to be a freshly dug grave under the stairs in the basement . On Friday , investigators returned to the house , dug up the grave and found a third body , Stacho said . A further search of the house and property found two more bodies in a crawl space and a sixth body in a shallow grave outside the home . Five different burial methods were used on the victims , and the bodies were in varying states of decomposition , said Miller , which made it difficult to determine the ages of the victims . Stacho said Sowell makes his living as a `` scrapper . '' `` He walks around and picks up scrap metal and takes it to junk yards to make a few pennies , '' he said . Sowell was convicted of a 1989 rape and was imprisoned from 1990 to 2005 , Stacho said . CNN 's Karan Olson contributed to this report .
NEW : Four more bodies unearthed on Tuesday , Cleveland police chief says . Total of bodies found at home of Anthony Sowell is up to 10 . Sowell , 50 , has been charged with five counts of aggravated murder . Bodies could have been there for `` weeks , if not months or years , '' coroner says .