U.N. High Commissioner for Human Rights Navi Pillay has criticized Sri Lanka for making too little progress toward ensuring accountability for alleged atrocities and war crimes during the civil war.
"I hope Sri Lanka will continue to engage constructively with the international community, notwithstanding the adoption of the resolution," Sinha said in a meeting with journalists Friday.
"Our view is that early progress of devolution and a political settlement within the framework of a unified Sri Lanka would be crucial in days to come," he said.
India has a strong interest in the issue because southern India is home to 60 million Tamils, but its government has been reluctant to become directly involved in Sri Lankan politics since a disastrous military intervention during the civil war left more than 1,000 Indian troops dead.
The Indian military intervention followed an agreement between India and Sri Lanka that led to an amendment of Sri Lanka's Constitution and established provincial councils in an effort to end Tamil militancy.
Sri Lanka's government also promised when the three-decade civil war ended to allow a greater degree of autonomy in Tamil-majority regions in the north.
However, the government has recently backtracked, saying it will take back the land and police powers given to the provincial councils. Indian leaders have expressed dismay at the move.
India abstained from voting last week when the U.N. rights council approved the U.S.-led resolution, calling it intrusive. Members of the 47-nation council voted 23 to 12 in favor of the resolution, with 12 abstentions, following a heated two-day debate.