Hong Kong police said Friday they are hunting the creator of a second Facebook group encouraging teenagers to commit suicide.

A force spokeswoman said experts from its Commercial Crime Bureau were investigating a social networking group named "I have to (practise) suicide" after a page with an almost identical name was exposed earlier this week.

"We are now investigating the two cases. No one has been arrested so far," she told AFP.

The new group emerged on Wednesday and nearly 100 people signed up, according to media reports.

"What is the meaning of life...my beloved is in love with another...while everything adults do is right, what we do is all wrong...no one knows we exist, why don't we all commit suicide?" the group wrote on its site.

It was created after the media reported this week that another Facebook group -- "I have to practise suicide", with no brackets in the title -- had called on its 190 members to kill themselves on December 21, and was linked to an attempted suicide.

The South China Morning Post said Friday that the police had already traced the creator of "I have to practise suicide".

It cited police sources saying the culprit was a local teenager who set up the site for fun.

The group came to light after police launched an investigation into the case of a 15-year-old boy who tried to throw himself off the roof of his school two weeks ago. The boy was a member of the group.