Chennai, Sep 19 (UNI) In a sudden decision that has set political tongues wagging, the OBC-Vanniyar dominated Pattali Makkal Katchi (PMK), a key constituent of the NDA headed by the AIADMK in Tamil Nadu, has decided not to support any political party in the October six Assembly bypolls to the reserved Madurantakam and Dharapuram seats, which would witness a tough five-cornered contest.