The United Nations nuclear watchdog warned that Iran has hit the "gas pedal" in its nuclear program as it continues to ramp up production of near-weapons grade uranium as President Donald Trump enters the White House.

The head of the U.N. nuclear watchdog warned world leaders on Tuesday that Iran is accelerating its enrichment of uranium rapidly.

The supreme leader announced he is prohibiting the development of nuclear weapons, which may be part of an effort to initiate sanctions talks.