NEW DELHI (Agencies) - President Asif Ali Zardari and Prime Minister Yousuf Raza Gilani have extended get well soon greetings to Prime Minister Manmohan Singh, an Indian government spokesperson said Sunday. Deepak Sandhu, media adviser in the Indian Prime Minister's Office (PMO), told news agencies that similar messages had also come in from British Prime Minister Gordon Brown and King Jigme Khesar Namgyel Wangchuck of Bhutan. Manmohan Singh is recuperating at the All India Institute of Medical Sciences here following a successful bypass surgery Saturday. "We have received best wishes in the form of bouquets and messages from our neighbouring states as well as from the British prime minister," Sandhu said. President Zardari and Prime Minister Gilani have sent bouquets and good wishes for speedy recovery of Dr Singh. Gilani also sent a message of felicitation to Manmohan Singh on the Republic Day of India falling today on January 26. In his greeting message, Gilani said, "It is a matter of pleasure for me to convey, on my own behalf and on behalf of the Government of Pakistan, our warm felicitation to you and to the government and people of India on the occasion of the Republic Day of India. I take this opportunity to reiterate our commitment to resolve peacefully all outstanding issues between the two countries so as to usher in an era of peace, progress and prosperity for the people of the subcontinent". Meanwhile, Indian Prime Minister Manmohan Singh recuperated in a New Delhi hospital on Sunday following successful heart bypass surgery just months ahead of general elections, doctors said. "The ventilator has been taken off and he is breathing on his own. This is an important step," Ramakant Panda, one of the surgeons, said after the 11-hour procedure. The 76-year-old prime minister had received family visitors and was eager to get back to work, said Panda. A statement from Singh's office said he was "making rapid progress" at the state-run All India Institute of Medical Sciences, where surgeons had performed five bypasses to clear blockages in his arteries. Doctors told a press conference late Saturday that they expected the prime minister to resume some official duties within two to four weeks, but predicted he would need up to six weeks to be fully active. News of Singh's health after the surgery was welcomed by his cabinet colleagues and members of his Congress party. "The entire country is rejoicing because our prime minister has come out successfully from the operation," Congress spokesman Veerappa Moily said. Singh, a diabetic, underwent heart bypass surgery in Britain in 1990 and angioplasty in 2003. He has largely been in good health since he was sworn in as prime minister in May 2004, but also recently underwent prostate surgery. His latest bypass surgery prompted concerns that his health could interfere with the Congress party's campaign ahead of a general election to be held in April. Congress said earlier in the week that the soft-spoken economist would lead the party into the polls. There has been widespread speculation that party chief Sonia Gandhi is lining up her son, Rahul Gandhi, heir to India's powerful Gandhi dynasty, as the next prime minister. A Congress spokesman dismissed the idea of a leadership change, saying it was "irrelevant to talk about it. Manmohan Singh is our prime minister and our vibrant prime minister."