The President, 75, complained of chest discomfort in the morning and thereafter he was rushed to the military hospital.
The President, who underwent routine tests and was put under observation, is now in a stable condition, the hospital said.
In a statement, the hospital authorities said: “He is undergoing routine check-ups and is under observation. His condition is stable.”
Prime Minister Narendra Modi spoke to the President’s son and enquired about his health.
Sources said the President will stay in the hospital till the time the entire medical diagnosis is complete. The doctors are taking care of things, said the hospital authority.