The Communist Party of India (Marxist) on Monday ruled out formation of a Third Front by Left Parties at the national level in near future.

"We have no plans to form a Third Front immediately," CPI(M) general secretary Prakash Karat told reporters after meeting DMK leader and Tamil Nadu Chief Minister M Karunanidhi at his residence in Chennai during which the Indo-US nuclear deal and the current political developments in the country came up for discussion.

"We want a commonality of approach by political parties on the nuclear deal. That was why we met the leaders of UNPA in New Delhi recently," Karat said.

Asked whether there was a threat to the UPA government in the wake of the stand-off with Left parties over the nuclear deal, he said, "As far as we are concerned, there is no threat to the government."