"There is no question of any threat veiled or unveiled. DMK and Congress are allies... Kindly do not speculate", party spokesman Abhishek Singhvi told reporters.
He also wished Karunanidhi, who turned 88, today. "We extend our greetings to him as a valued ally," he said replying to a question.
In Chennai, Karunanidhi said that "cadres who have dedicated themselves to social and political renaissance should keep going without forgetting that bad friendship will end in trouble".