- North Korea appears to have restarted its nuclear facility at Yongbyon, the International Atomic Energy Agency (IAEA) has said, according to BBC News.
The IAEA has no access to North Korea after being thrown out in 2009, so relies largely on satellite data.
But the agency's head, Yukiya Amano, said recent images indicated "activities related to the five-megawatt reactor, expansion of enrichment facilities and activities related to reprocessing".
The Yongbyon site processes spent fuel from power stations and has been the source of plutonium for North Korea's nuclear weapons programme.
The reactor was shut down in 2007 but Pyongyang said last year that it was operational again.
It has since conducted its fourth test of a nuclear weapon.
That and its multiple missile tests broke existing international sanctions and provoked further measures from the UN and individual countries.
