The International Atomic Energy Agency (IAEA) chief says that UN inspectors have found "nothing to be worried about" in Iran's latest nuclear facility.

"The idea was to use it as a bunker under the mountain to protect things," Mohamed ElBaradei told the Thursday print of the New York Times, pointing to Iran's Fordo nuclear facility, some 160 kilometers southwest of Tehran.

"It's a hole in a mountain," the IAEA chief said.

Nuclear inspectors had visited the newly constructed nuclear facility in October.

The IAEA is expected to declare details of the inspection in its next report due in mid-November.

ElBaradei also said that he was examining possible compromises to unblock a draft nuclear cooperation deal between Iran and major powers.

MGH/SS/MMA