"According NIA reports Uday Kumar is undercover LTTE. No wonder Catholic Church is supporting his anti-national stir against Kundankulam unit," read his tweet dated Mar 21.
Uday Kumar, who has been volunteering People's Movement Against Nuclear Energy has been claiming that the Kudankulam Power Plant is unsafe.
He is also alleged to be have links to the Sweden-funded NGO called IDEA, which is said to have funded anti-Koodankulam protest.
Prime Minister Manmohan Singh earlier, in an interview with the 'Science', an American Magazine, said that the KNPP protest was being funded by foreign NGOs based in the US and Scandinavian countries.
Meanwhile, Uday Kumar sent a legal notice to Prime Minister Manmohan Singh over the issue claiming that the comments by the PM were to defame him. [Read More: Prime Minister Manmohan Singh sent legal notice]