IAEA: Agency head says concerned about North Korea's continued nuclear activities

At a ruling party congress being held in Pyongyang, North Korea said it will strengthen its self-defensive nuclear weapons capability in defiance of U.N. resolutions.

  International Atomic Energy Agency (IAEA) Director General Yukiya Amano takes part in a news conference during a visit to the Belarusian nuclear power plant, which is under construction, near Ostrovets, Belarus, April 19, 2016.  

North Korea's continued nuclear activities are of "great concern" to the region and beyond, the head of the International Atomic Energy Agency (IAEA) told reporters on Monday.

IAEA director Yukiya Amano said the agency did not have an inspector on the ground in the state and was monitoring it using satellite imagery.

At a ruling party congress being held in Pyongyang, North Korea said it will strengthen its self-defensive nuclear weapons capability in defiance of U.N. resolutions.