Former Puducherry Speaker VMC Sivakumar was hacked to death with sickles on Tuesday by an unidentified gang at Neravy-Thirupattinam in Karaikal.
The 67-year-old leader was on his way to inspect construction work when his car was blocked by a gang and attacked with sickles, police told Press Trust of India.
He was immediately taken to a government hospital but was declared brought dead.
Police are yet to make arrests.
He is survived by his wife, two sons and two daughters.
Sivakumar entered politics in 1977 contesting from Neravy Thirupattinam for the DMK. He, however, lost the election but went on to defeat the same sitting MLA VMC Varadhapillai in 1980.
The six-time MLA has held a series of cabinet posts over the years, becoming minister of agriculture, animal husbandry, consumer affairs and fisheries. He was also speaker of the Puducherry Assembly from 1996 to 2000.
While Sivakumar was elected as an MLA five-times on a DMK ticket, in the 2011 assembly polls, he chose to contest as an independent. He won the Neravy Thirupattinam seat and went on to extend support to the NR Congress government.
Sivakumar went on to join the AIADMK in May 2016 following a meeting with then Tamil Nadu Chief Minister Jayalalithaa. He contested in the 2016 assembly election on an AIADMK, but was defeated.