"It is very important that international law is followed. Many countries have voted against it," said Kanimozhi.
Referring to the war crimes in Sri Lanka, the DMK MP termed it as human rights violation.
The move was also welcomed by Left leader D Raja, who said, "I thank the Prime Minister."
He, however, said that the need was to keep up the pressure on Sri Lanka.
Raja said, "We have to continue pressure on Lanka, so that Sri Lankan Tamils get genuine political solution."
The government, meanwhile, said that the move was meant to protect human rights.
Union Minister Vayalar Ravi said, "The government was concerned about the safety and security of Tamils in Sri Lanka, so naturally, it is a move to protect human right."