Nanjil Sampath, MDMK propaganda secretary and open supporter of the banned Liberation Tigers of Tamil Eelam (LTTE) was on Sunday charged under the National Security Act a day before he was to be released from jail as per court orders, the police said.
According to police sources, Sampath was due to be released from detention Monday upon the directions of a judicial magistrate Tirupur but was served with fresh orders on Sunday morning.
Sampath is the third prominent personality to be jailed for pro-LTTE stance in the last 15 days.
Tamil movie director Seeman and politician Kolathur Mani were detained on the same charges Feb 18 and March 11 respectively.
The police said that the three, in their speeches, called for an armed rebellion to help establish a separate Tamil homeland in Sri Lanka.
Chief Minister M Karunanidhi had warned pro-LTTE elements that the act would be invoked against all anti-national politicians.