Iran's recently elected hard-line president has said the Bush administration should be tried on war crimes charges.
"You, who have used nuclear weapons against innocent people, who have used uranium ordnance in Iraq, should be tried as war criminals in courts," Mahmoud Ahmadinejad said in an apparent reference to the United States.
Ahmadinejad did not elaborate, but he apparently was referring to the U.S. military's reported use of artillery shells packed with depleted uranium, which is far less radioactive than natural uranium and is left over from the process of enriching uranium for use as nuclear fuel.
Since the Iraq war started in 2003, American forces have fired at least 120 tons of shells packed with depleted uranium, an extremely dense material used by the U.S. and British militaries to penetrate tank armor. Once fired, the shells melt, vaporize and turn to dust.
"Who in the world are you to accuse Iran of suspicious nuclear armed activity?" Ahmadinejad said during a nationally televised ceremony marking the 36th anniversary of the establishment of Iran's volunteer Basij paramilitary force.
Iran has been under intense international pressure to curb its nuclear program, which the United States claims is part of an effort to produce nuclear weapons. Iran denies such claims and says its program is aimed at generating electricity.
Iran insists that it has the right to fully develop the program, including enrichment of nuclear fuel - a process that can produce fuel for nuclear reactors or atomic bombs.
Iran has temporarily stopped its enrichment program, but negotiations with Britain, France and Germany broke off in August after Tehran restarted another part of its program: the conversion of raw uranium into the gas that is used as the feeder stock in enrichment.