Those familiar with the strict White House protocol said that this is rarest of the rare gesture by the President, which they have not seen in the recent past.
Officials in the past have noted that Obama has great respect for the Prime Minister not only as a great leader and a statesman but also as an economist. The two leaders have enjoyed a great personal equation.
In his remarks, Obama praised the Prime Minister.
"He has been a great friend and partner to the United States and to me personally during his tenure as Prime Minister of India," Obama said.
"Across the board, Prime Minister Singh has been an outstanding partner," he added.
"Thank you so much for all your efforts to continue to strengthen ties between our two countries," Obama told Singh.
Singh too praised Obama for his commitment for India US relationship.
"In the President, the United States has a leader who realises and recognises the contribution that a resurgent India can make not only to fighting poverty, but also to global peace and prosperity," Singh said.
Meanwhile, a group of Kashmiris and Sikhs held a protest demonstration outside the White House, even after the Prime Minister left after his meeting with Obama.
