"Please ask them. Ask BJP," PMK founder leader S Ramadoss told reporters on the sidelines of a party meet when asked if his party continued to be part of the BJP-led alliance.
Asked if his party would be part of the BJP alliance for the 2016 Assembly elections, he said it would only be decided by the party general council.
The PMK leader's son, former union minister Anbumani Ramadoss, also echoed similar views at Sivakasi in Tamil Nadu. "It is the BJP which has to say if the alliance still exists."
The Centre's alleged denial of visas for UN team members to probe war crimes in Sri Lanka and 'Sanskrit week' celebrations were among issues that touched a raw nerve.
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The BJP's seven party alliance which brought together rival parties like DMDK and PMK was even considered a breakthrough.
The future of the "rainbow alliance", made possible after a lot of groundwork and persuasion by several BJP leaders including former state unit president and Union Minister of State Pon Radhakrishnan now appears to be under a cloud.
Besides the saffron party, the NDA coalition in Tamil Nadu comprises DMDK, MDMK, PMK, IJK, Kongu Nadu Makkal Desiya Katchi and Puthiya Neethi Katchi.