Party working president M K Stalin along with leaders including Rajya Sabha MP, R S Barathy placed a wreath on the body of 78-year-old Periasamy.
Periasamy was undergoing treatment for an ailment for sometime at the hospital and he died at 7 am, the party said.
A veteran party leader and a former MLA, he is the father of former minister Geetha Jeevan and party functionary N P Jegan.
A party release said party flags will be flown at half-mast for three days beginning today and party programmes will be deferred.
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