The head of Iran's Atomic Energy Organization announced Friday that they were in the process of building a facility designed to produce nuclear fuel, according to the New York Times.
The announcement marks the first time that international authorities had been told about the existence of the plant.
President Obama said that that the Iranian nuclear program challenges the nuclear nonproliferation regime.
British Prime Minister Gordon Brown said that the international community must "draw a line in the sand."
French President Nicolas Sarkozy along with President Obama and Prime Minister Brown demanded that the plant be opened for inspection.
The U.S. and Israel have not not ruled the possibility of a last-resort military strike against Iran's nuclear facilities, according to the Associated Press.