Indian Prime Minister Manmohan Singh was discharged from a hospital Sunday, a week after he underwent a heart bypass surgery, CNN reported. Prime Minister Manmohan Singh had coronary artery bypass surgery. He left the All India Institute of Medical Sciences for home at 7:45 a.m., the Indian government said. Doctors will continue to monitor his progress and have asked him to eat more and step up physical activity. The 76-year-old underwent a coronary bypass surgery on January 24. He also had a bypass in 1990 and an angioplasty in 2004. India's External Affairs Minister Pranab Mukherjee is in charge of Singh's Finance Ministry portfolio until the prime minister recovers. Doctors have said he will be able to resume most of his duties in a month.