The Central Bureau of Investigation (CBI) on Thursday registered a case against Tamil Nadu Police and Revenue Department officials after 13 protestors were killed in police firing during Anti-Sterlite protests in Thoothukudi, on May 22.
The people were protesting against the construction of the Sterlite copper plant, claiming that it was polluting groundwater, and was hazardous for the environment.
Taking note of the people's demand, the Tamil Nadu government on May 28 ordered the closure of the plant.
In August, the Madras High Court ordered a CBI probe into the police firing.
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