A Chinese police official apologized Saturday for his department's handling of a case in which a man allegedly killed two of six women he had held captive in his underground lair, where they were raped, forced into prostitution and featured in porn videos, state-run media reports.

Li Hao, a 34-year-old who had worked for the technological supervision bureau in the city of Luoyang, is currently in custody. But not before, authorities claim, he engineered an involved scheme to hold young women as "sex slaves," according to state-run news agency Xinhua.

The married father of one son admitted to digging two underground