Former Prime Minister Manmohan Singh was admitted to the All India Institute of Medical Sciences (AIIMS) in New Delhi on October 13 .
The Congress, in a statement, noted that Singh was "undergoing routine treatment" at the hospital.
"There are some unsubstantiated rumours with regards to former PM, Dr Manmohan Singh ji’s health. His condition is stable. He is undergoing routine treatment. We will share any updates as needed. We thank our friends in media for their concern," All India Congress Committee (AICC) Secretary Pranav Jha tweeted.
Earlier, sources told CNN News 18 that Singh has been admitted in the cardiology department of AIIMS. The ex-PM has a history of heart-related ailments, and had undergone a coronary bypass surgery at the hospital in 2009.
Since 1990, when he underwent a bypass operation, Singh had five bypasses performed on him and a stenting treatment in 2004.
In May last year, he was admitted to AIIMS after he had complained of chest pain.
Singh, 89, was also hospitalised earlier this year, after he had tested positive for COVID-19 on April 19. The ex-PM, however, had successfully recovered from the infection and was discharged on April 29.
Currently a Rajya Sabha MP representing the state of Rajasthan, Singh had served as the country's prime minister between 2004 to 2014.
Before his 10-year stint at the helm of central government, the Congress veteran also served as the Union finance minister during the critical period of 1991 -- when the Indian economy was liberalised to offset a financial emergency.
Discover the latest Business News, Sensex, and Nifty updates. Obtain Personal Finance insights, tax queries, and expert opinions on Moneycontrol or download the Moneycontrol App to stay updated!
Find the best of Al News in one place, specially curated for you every weekend.
Stay on top of the latest tech trends and biggest startup news.