Manmohan Singh admitted to AIIMS

Former prime minister Manmohan Singh was admitted to the AIIMS here on Sunday evening after he complained of uneasiness, sources said.

Singh, 87, is under observation at the cardio-thoracic ward of the premier hospital, they said.

"All his parameters are fine. He is under observation at the AIIMS," a source close to him said, adding that he was taken to the hospital after he felt "uneasiness".

He was admitted under Dr Nitish Naik, a professor of cardiology at the All India Institute of Medical Sciences (AIIMS), around 8.45 pm.

Singh is a senior leader of the opposition Congress and is currently a Member of Parliament in the Rajya Sabha from Rajasthan. He was the prime minister between 2004 and 2014.

In 2009, Singh underwent a successful coronary bypass surgery at AIIMS.