SHRC members also visited the Sterlite staff quarters and assessed the damage caused to the company property by protesters.
They later visited the injured at the hospitals.
The state government constituted Commission of Inquiry under retired Madras High Court judge Aruna Jagadeesan also requested the public to give it information about the violence and firing, either in person or through letters before June 22.
Thirteen people were killed in police firing on May 22 and 23 after protests for closure of the plant over pollution concerns turned violent in Tuticorin.
Election Results for Lok Sabha Election 2019 will be out on May 23. Get the latest election news and live updates on ndtv.com/elections. Catch all the action on NDTV Live. Like us on Facebook or follow us on Twitter and Instagram for news updates from each of the 543 parliamentary seats for the election 2019