Gandhian Sasi Perumal died on Friday while protesting against liquor shops in Tamil Nadu, as per reports.
Perumal had been campaigning for total prohibition in Tamil Nadu and had even found backing in DMK chief M Karunanidhi.
The 59-year-old activist had reportedly climbed a 150-feet high mobile tower during the protests in Kanyakumari, and soon fainted, according to The Times of India.
He was brought dead to the hospital, the report said.
Images shared on social media showed blood stains on his shirt.
Sasi Perumal had attended the funeral of former president Dr APJ Abdul Kalam on Thursday in Rameswaram, and had travelled to Kanyakumari's Marthandam for the ongoing protests on Friday.
The Gandhian activist had been holding hunger strikes over several years seeking a total ban on liquor in the state.
Twitterati expressed shock at Sasi Perumal's death.
Shocking to hear the death of Sasiperumal Kandaswamy. Don't know what to say.
— Jagadheeswaran (@Dhakshinamoorth) July 31, 2015
Sasi Perumal was on the cell phone tower for 5 hours it is reported. Why could the fire&rescue services not go up there and get him down? — Sumanth Raman (@sumanthraman) July 31, 2015