New Delhi, Jan 26 : Prime Minister Dr Manmohan Singh continues to make excellent progress in his recovery following the 11 hour long heart surgery performed on him on Saturday.

According to reports, he sat up this morning and had some semi-solid food. Several of his invasive monitoring lines have been removed and physiotherapy is being given to enable early mobilisation.

Dr Manmohan Singh is regularly conversing with his family and doctors.

According to Dr K S Reddy, personal physician to the Prime Minister, Singh will be fit enough to resume some part of his duties within four weeks.

The Prime Minister, himself is eager to resume work as early as possible.

Dr. Singh was admitted in the All India Institute for Medical Sciences (AIIMS) on Saturday, where an angiography-X-ray examination of the blood vessels was conducted on him. He also underwent several blood chemistry tests, CT scan and ECG, which confirmed arterial blockages in his heart.

He missed the Republic Day parade and opted for an immediate surgery, as he wanted to be ready and fully active well before the elections.

Prime Minister, Dr. Manmohan Singh, was taken off ventilator support on Sunday morning and has been continuously recovering well since. (ANI)