A showcause notice has been issued on behalf of Tamil superstar Rajnikanth [Images] to a section of his fans in Coimbatore who had recently floated a political party without obtaining prior permission from him.

The notice, seeking explanation, has been sent by the All India Rajnikanth Fans Association president Sathyanarayana, according to sources.

The sources said the notice carried a strong message from the actor that necessary disciplinary action would be taken against the fans if they failed to give a suitable explanation within 15 days.

Announcing the party's name as Desiya Dravidar Makkal Munnetra Kazhagam, the new outfit's leader Rajni Babu last week released the party flag in red, white and black -- featuring Rajnikanth's face on a shining star.

According to Rajni Babu, who is a councillor in Madukkarai in Coimbatore, the party had been launched only to put pressure on their hero to enter politics.

"We had neither informed Rajnikanth nor got his permission to launch the outfit," he had reasoned.

However, another section of fans in the textile city protested the move of starting a political party and urged the actor to remove them from the fans association.

Meanwhile, Coimbatore district president of Rajnikanth Fans Association Singai C Ulaganathan had expelled some of the members for floating a political party in the name of the actor.

Condemning the fans' move, he said everything was done under the leadership of one Abu, who was expelled from the fans association a couple of years ago.

The issue of notice comes a day after Rajni's fans from various districts held a meeting in Chennai and threatened to launch an indefinite fast till the actor acceded to their demand of forming a political party.