Residents and environmental activists have long demanded a shutdown of the copper smelter, India's second-biggest with an annual production of more than 400,000 tonnes, citing air and water pollution.
On May 23, the construction of a second copper smelting plant by Sterlite in Tuticorin was put on hold by the Madras High Court amid angry protests. Sterlite has been planning to build a second plant with aims to double production capacity.
Activists have been up in arms at the prospect of a second Sterlite plant in the area and have been on protest for more than three months.
The Tamil Nadu government on Monday ordered the closure of the copper plant in Thoothukudi, marking a significant setback for the Anil Agarwal-owned Vedanta unit, which called the closure of the plant it has operated for over 22 years an "unfortunate development".
The opposition escalated last week when thousands of people marched towards a government office on the 100th day of the protest. Ten people were killed in police firing that day; three more died in subsequent days.
Meanwhile, the Tamil Nadu assembly, which reconvened today after a gap of over two months, witnessed protest by the opposition DMK over police firing during the anti-Sterlite protests in Tuticorin that resulted in the death of 13 people. DMK's working president MK Stalin and other party leaders arrived in the House wearing black clothes.
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