Li Hao, a 34-year-old former firefighter, locked up the victims in a cellar that he dug under a storeroom in Henan province's Luoyang city, the Southern Metropolis Daily said.
Li, who is married and has a child, enticed and abducted the women, who worked in night clubs, over the past two years.
He dug the 20-sq-metre cellar four meters deep under the storeroom. The victims were forced to have sex. Two of them were killed and buried in the cellar.
The victims were finally freed in early September after one of them escaped and related her ordeal to the police. She was allowed to venture out since he used her as a prostitute.
Police have, however, arrested one of the rescued women as she was involved in the murder one of the victims, China Daily said Thursday. Police unearthed two bodies from the cellar Sep 6.
