Police are probing an unlicensed kindergarten in Zhuzhou City, central Hunan Province after a six-year-old girl was found suffering from a venereal disease, China National Radio reported.

The girl told her parents that she played the strip-off game with a boy in the kindergarten, but her parents suspected that it was a male teacher who molested their daughter and infected her with the disease.

The cause of the girl's disease is still a mystery and police are investigating the kindergarten.

The girl's parents told the media that they were shocked to learn that their daughter had been infected with acute gonorrhea, a venereal disease transmitted by a child molester or someone who touched her private part.

The six-year-old said she played the strip-off game with a boy but no teacher tried to stop them. Her parents accused the teachers of molesting their daughter and questioned why the two kids would play nakedly in the classroom under the eyes of the teacher.

In response, kindergarten officials denied the accusation and said all their teachers were required to have health checks in hospital and no one was diagnosed of such a disease.

The officials also denied the two children had played nakedly in the classroom but refused to show video footages from surveillance cameras.

The kindergarten was found to have operated for more than one year without a business license.