The PMK, a backward Vanniyar community backed party, has warned of state-wide agitations if the Tamil Nadu government does not implement 20 per cent reservation for them in educational institutions and jobs and enumeration of caste based cenus.

"The PMK will launch the next phase of its agitation all over the state if our demands are not met by the state government," Dr Anbumani Ramadoss, son of party founder leader Dr S Ramadoss, said.

Addressing a rally here yesterday, he demanded that the DMK government initiate the process of collecting caste wise data and complete it within a timeframe. After doing so, they should arrive at the percentage of reservation as suggested by the Supreme Court recently while hearing a batch of petitions, questioning validity of 69 per cent reservations in Tamil Nadu and also in Karnataka, he said.

If no steps were taken, PMK might be forced to resort to other means of protest like in 1987 "when the entire state came to a standstill due to our agitation," he said.