A day after a 27-year-old man was arrested following the discovery of nine dismembered bodies in his Kanagawa Prefecture apartment, it emerged Wednesday that some of the victims were teenage girls.

Takahiro Shiraishi of Zama, Kanagawa Prefecture, has admitted to the killings, police said. He told investigators that the murders started with the killing of a man concerned about the disappearance of his girlfriend in late August.

"I invited him to my apartment and killed him," Shiraishi was quoted as saying by police. Shiraishi said the victims, eight of whom are believed to be women, included four people in their late teens, four aged around 20 and one in their late 20s, according to police.