Police are still investigating claims that Penang Chief Minister Lim Guan Eng's son had sexually assaulted a schoolmate, almost six years since the allegations circulated on pro-Umno blogs.

Police received six complaints alleging that the then 16-year-old boy had committed the crime, and that money was paid to ensure the matter was not circulated online.

Lim had vehemently denied the allegations while the headmaster of the school the boy attended said no such incident occurred there.

"The case is classified under Section 500 of the Penal Code and to date no one has come forward to say they have been molested, or to confirm the incident.

"The case is still under investigation, to determine the identity of those who spread the allegations," Home Minister Ahmad Zahid Hamidi said in a written parliamentary reply during the previous sitting of Parliament last year.

He was responding to a verbal question from Lim, who asked why no action has been taken against those who spread the lies.

The claims were published, among others, on pro-Umno blogger Papagomo's website.

The allegations were accompanied with a picture of the so-called victim.

However, Anya Corke, a one-time Hong Kong chess champion whose picture was used, denied knowing Lim's son or that she was molested.

The bloggers then claimed that her picture was randomly used to protect the identity of the real victim.