Prime Minister Manmohan Singh [Images] was discharged from the All India Institute of Medical Sciences on Sunday, more than a week after he underwent a successful coronary by-pass surgery at the prestigious hospital.

"The prime minister has been discharged from AIIMS. He was very cheerful and was enquiring about activities and happenings. He is on his way to a speedy recovery," Union Health Minister Ambumani Ramdoss told reporters in New Delhi [Images].

"I am sure he will recover quickly and it is going to take him about two to three weeks to come to office and work. In fact, in a week's time, he will start working from home. By the pace of his recovery, I am sure he will come to office in 2-3 weeks," he said.

Before getting into the car, the 76-year-old prime minister thanked all the doctors and staff who attended on him during the surgery and post-operation period, the PM's Media Advisor Deepak Sandhu said. He was accompanied by his wife and a daughter.

"He is pleased to be back at home," she said, adding his physiotherapy will continue.

The prime minister was discharged after the doctors completed the pre-discharge tests on Saturday. He was admitted in the hospital on January 23 and underwent the surgery the next day.

The decision to discharge Singh from the hospital was taken by a team of doctors from Mumbai's [Images] Asian Heart Institute led by surgeon Dr Ramakant Panda.

When asked about post-surgery concerns, Ramadoss said, "Infection is primarily of most concern for us. And we have seen that he has recovered very well".