Special US envoy for Afghanistan and Pakistan Richard Holbrooke was hospitalised on Saturday after he fell ill while at work at the Foggy Bottom headquarters of the State Department.
Mr Holbrooke was admitted to the intensive care unit of the nearby George Washington University and was being treated for blood clot, the ABC news reported. He was meeting with secretary of state Hillary Clinton when he gasped and clearly was undergoing some sort of medical situation, it added.
"All I can tell you is that the Ambassador is at the hospital at the present time," State Department spokesman P.J. Crowley said. Mr Holbrooke has fallen ill when the annual Af-Pak policy review of White House is being carried out.
Mr Holbrooke is the Obama administration's point man for Afghanistan and Pakistan. The same day, treasury secretary Timothy Geithner was also admitted to George Washington University Hospital for treatment for a kidney stone.
"He will have a minor surgical procedure this afternoon to remove he kidney stone, and his physician expects that he will be discharged tomorrow with orders to rest this weekend. He has been told that he should be able to return to work on Monday," a Treasury statement said.