DMK President M. Karunanidhi will have to remain in the Kauvery Hospital for an extended period owing to age-related health issues including altered liver function, the hospital said on Tuesday.

In a statement issued on the 94-year-old veteran politician, the hospital said: "Although there has been resolution of the condition which led to his hospital admission, an extended period of hospitalisation will be necessary due to age-related overall decline in his general health, altered liver function and haematological parameters."