Brother of former AIADMK leader V K Sasikala, TV Sundaravadanam, passed away on Saturday following a cardiac arrest, sources said.
The 78-year-old Sundaravadanam is also the father-in-law of Amma Makkal Munnetra Kazhagam (AMMK) leader and independent legislator TTV Dhinakaran.
Sources close to the family said Sundaravadanam was not keeping well for some time and suffered a cardiac arrest this morning.
His last rites are slated to be held at Thanjavur on Sunday, they added.
Sundaravadanam's wife had deceased before him. Sasikala is presently lodged in the Parappana Agrahara prison in Bengaluru in connection with a graft case.