The 93-year-old veteran was accompanied by his son and DMK working president MK Stalin, daughter Selvi and senior leader Durai Murugan, among others. The leader briefly interacted with them and reportedly signed a register there.
M Karunanidhi fell ill in October last year due to a drug-induced allergy. In December, he was admitted to a private hospital here twice.
He was admitted to the hospital for "optimisation of nutrition and hydration" in the first week of December and later, due to a throat and lung infection. He had undergone tracheostomy, a procedure to optimise breathing.
Earlier, Mr Karunanidhi had made a public appearance in October this year when he visited an exhibition held for the 75th anniversary of party mouthpiece Murasoli.
Get the latest election news, live updates and election schedule for Lok Sabha Elections 2019 on ndtv.com/elections. Like us on Facebook or follow us on Twitter and Instagram for updates from each of the 543 parliamentary seats for the 2019 Indian general elections.