Director general Yukiya Amano made the comments in a speech to the IAEA's governing board.

BBC: IAEA demands Iran nuclear access to Parchin site

Amano has said in the past that even if inspectors are allowed in, it is unlikely they would be able to find anything.

CNN: Story highlights

Access should be granted without waiting for further talks, Mr Amano added.

BBC: IAEA demands Iran nuclear access to Parchin site

Yukiya Amano said Iran has to first address the U.N.

CNN: Story highlights

Amano also said that as of 14:30 EST, there has been no significant changes to the status quo of Fukushima units 1, 2 and 3.

FORBES: IAEA Chief Off to Japan, Says Tokyo Radiation Levels Not Hazardous

Amano briefed reporters for around 45 minutes and said that he intends to stay in Japan for one night only, possibly leaving for the country on Thursday.

FORBES: IAEA Chief Off to Japan, Says Tokyo Radiation Levels Not Hazardous

The recent report by the director of the International Atomic Energy Agency (IAEA), Yukiya Amano, raised serious concern over Iran's actions to develop a nuclear warhead for its missiles.

CENTERFORSECURITYPOLICY: Game-changing chance

Tokyo radiation levels are not hazardous to human health at this time following radiation leaks at the Fukushima nuclear power plant, the International Atomic Energy Chief Yukiya Amano told reporters Wednesday.

FORBES: IAEA Chief Off to Japan, Says Tokyo Radiation Levels Not Hazardous

Following the US's lead, on Thursday Yukiya Amano, the new Director General of the International Atomic Energy Agency wrote a letter to IAEA member states asking for their suggestions for how to convince Israel to sign the NPT.

CENTERFORSECURITYPOLICY: Time to plan for war