GUANGZHOU: The police here yesterday arrested a 13-year-old boy who allegedly killed a three-year-old girl and then had sex with her corpse on May 19.

An official of the Haizhu district public security bureau in Guangzhou, Guangdong province, said: "We have arrested the boy and are interrogating him to determine the motive of the murder."

The police arrested the accused, whose real name has been withheld as he is a minor, on May 21, the official said.