Chennai, July 30 -- PMK President Anbumani Ramadoss on Thursday criticised reports that Tamil Nadu Chief Minister Joseph Vijay may travel to Karnataka for talks on the Mekedatu dam project, warning that any such visit would be "highly detrimental" to the state's interests.

Speaking to reporters at Chennai International Airport before leaving for Delhi, Ramadoss also challenged Congress leader Rahul Gandhi, saying the PMK was prepared to walk out of the NDA if Gandhi spoke out against the dam.

Ramadoss said, "If the Chief Minister travels to Karnataka to hold talks on the Mekedatu dam issue, it will be highly detrimental to Tamil Nadu. We do not accept the Mekedatu dam project, nor have we approved it. Therefore, there is no meaning in h...