VIENNA - Activities have been observed at a North Korean nuclear site that "are consistent" with an effort to restart a reactor there, the UN nuclear agency chief said on Thursday.
Pyongyang announced in April that it would revive the aged research reactor at its Yongbyon nuclear complex - which experts say is capable of producing plutonium for bombs - but stressed it was seeking a deterrent capacity.
Yukiya Amano, director general of the International Atomic Energy Agency, said the Vienna-based IAEA continued to monitor developments at Yongbyon, mainly through satellite imagery.
"Activities have been observed at the site that are consistent with an effort to restart the 5MW(e) reactor," Amano told the IAEA's 35-nation board, referring to the research reactor. "However, as the Agency has no access to the site, it is not possible for us to conclusively determine whether the reactor has been re-started."