What we know about Karunanidhi's health so far

Karunanidhi, the leader of Tamil Nadu's opposition Dravida Munnetra Kazhagam (DMK) party, is receiving treatment at home for fever caused by a urinary tract infection. He is 94.

The Kauvery Hospital reported a "slight" decline in his health last evening.

Here's what we know about his health and political career so far.