The International Atomic Energy Agency (IAEA) tweeted on Thursday that it had found no signs of undeclared nuclear activity after inspecting three Ukrainian facilities.

Iran PressEurope: The International Atomic Energy Agency (IAEA) said on Thursday it had found no sign of undeclared nuclear activity at three sites in Ukraine that it inspected at Kyiv's request in response to Russian allegations that work was being done on a "dirty bomb".

Moscow has repeatedly accused Ukraine of planning to use such a bomb - a conventional explosive device laced with radioactive material - and said institutes linked to the nuclear industry were involved in preparations, however, Ukraine's government denies the accusation.

Igor Krylov, head of Russia's forces for radioactive, chemical and biological protection, told a briefing at the end of October that the Russian Defense Ministry had prepared its forces and equipment to act "in conditions of radioactive contamination."

Russian Foreign Minister Sergei Lavrov also spoke about the threat of a "dirty bomb" and this issue was raised by Moscow at the United Nations Security Council. The Russian side also mentioned facilities in Ukraine that can do such things. 219