IAEA: N. Korean still working at main nuclear site

North Korea appears to be still expanding operations at its main nuclear site, the UN atomic watchdog indicated on Thursday.

The statement by the head of the International Atomic Energy Agency is a further sign that North Korea is pressing ahead with its atomic activities despite pressure from the United States for it to scrap its nuclear weapons program.

At a leaders' summit in June both sides pledged to work towards the complete denuclearization of the Korean Peninsula.