It said the Tamil Nadu Pollution Control Board had earlier this year rejected Sterlite's application seeking renewal of consent to operate the plant over non-fulfilment of green norms, including those related to disposal of copper waste and effluents. The panel will be headed by retired Judge Aruna Jagadeesan.
Union Home Ministry officials said the ministry is in touch with the state government over the developments in the port town in the southern state. "The Tamil Nadu government requests the people to accept this (assurance) and maintain peace", it said.
Residents and activists say emissions from the smelter are polluting the air and the water, affecting the health of residents and pose a risk to fisheries.
A large number of people had gathered outside the Tuticorin collector's office to mark the 100th day of the protest, even after imposition of orders prohibiting unlawful assembly on Tuesday. The protest had been going on for months and turned violent on Tuesday when protestors were not allowed to march up to the plant.
"The inaction of the government has led to the people's protests and police resorting to firing to control it", M K Stalin said, demanding that the plant be shut down immediately for good.
After meeting the injured in the hospital, Haasan demanded the closure of the unit and asked who ordered the police to open fire at the protesters.
The Madras High Court ordered to preserve the bodies of the deceased until further orders, News18 reported.
Security has been beefed up in Thoothukudi following the clashes.
At least 12 people have died in the violent protests, local media reports said.
Kamal Haasan also blamed the government for ignoring peaceful protests. The company has appealed to the government and authorities to ensure safety of our employees, facilities and surrounding communities. Dravida Munnetra Kazhagam Working President MK Stalin is also likely to visit the city.
Chief minister Edappadi Palaniswami confirmed nine people were killed when the police fired on anti-Sterlite protesters. He has questioned the role of the state's chief secretary and asked whether the state government would take action against the police chief.