Party chief M Karunanidhi, responding to the alleged cold-blooded killing of slain LTTE chief V Prabhakaran's 12 year-old son Balachandran, said this was proof enough that "(Sri Lankan President) Rajapakse is a war-criminal."
"Countries need not search for more proof that Rajapakse is a war criminal as the atrocity like gunning down of Balachandran cannot be seen anywhere else. There is no record of such a brutal murder in any country," he said in a statement.
He said images in UK-based Channel 4 documentary had moved political leaders in the state to tears. "How can one point a gun at the teenager?" he asked.
"Channel 4 is making clear to the world various atrocities committed by the Sri Lankan Army and the face of Rajapakse, who claims himself to be a noble man, is exposed," he said. The island nation's army had been spreading lies that the boy was killed in battle, he said.
On the US sponsored Lanka-specific resolution at UNHCR, he said many countries had supported it, but "it is a matter of regret India that has not officially declared its stand."
"There was a natural desire in the state for India to play an active role in UN on this matter by virtue of the people sharing an 'umbilical cord' with Lankan Tamils, he said.
"...The Indian government seeming to show laxity on this matter and welcoming Rajapakse, who is the reason for all such atrocities, cannot be tolerated," he said in an apparent reference to the Lankan leader's recent pilgrimage to India.
UN had written to various countries seeking their support on the rights abuse issue against Colombo even as it has not taken any action in the last one year on such charges,he said.
"Therefore, when countries like the US come forward to take action against Sri Lanka, Indian government should also come forward to strengthen such initiative rather than shielding it. This is the desire of people of Tamil Nadu, this is their request," the 88 year-old leader added.
In New Delhi, the AICC sought to downplay contentions of a rift between Congress and DMK on the issue and questions on how the ruling party will placate its southern ally.
Congress spokesperson Sandip Dikshit said it is "not just an issue of placating, but an issue of foreign affairs. And I am sure we will get the support (of allies) in the steps that we take".
India has always the raised the humanitarian issues concerning Sri Lankan Tamils, he said.
Regarding the tapes related to the alleged cold-blooded killing of LTTE chief V Prabhakaran's 12 year-old son Balachandran, the Congress spokesperson said, "some tapes have emerged. The Minister of External Affairs has said that we do not know they are right or not. Let us leave it at that."