Dravida Munnetra Kazagham legislator J Anbazhagan died of COVID-19 in Chennai on Wednesday, a private hospital said.
"The 61-year old MLA, who has been fighting for his life with severe COVID-19 pneumonia rapidly deteriorated early on Wednesday morning.
In spite of full medical support, including mechanical ventilation at our COVID-19 facility, he succumbed to his illness," Dr Rela Institute and Medical Centre said in a statement.
DMK President M K Stalin condoled Anbazhagan's death and paid rich tributes to him.
Anbazhagan, who had co-morbidities including chronic kidney disease was put on ventilator support on June 3 after his respiratory distress worsened.
After showing improvement, his health condition deteriorated significantly on Monday.