Ukraine's rescue services take part in a training session on managing the risk of nuclear accidents, including the deactivation of radiation dust, as fears of a large-scale accidents rise due to shellings in the vicinity of the Zaporizhzhia Nuclear Power Plant. Ukraine and Russia traded fresh accusations of shelling at the Zaporizhzhia nuclear power plant on Saturday, as its operator warned of the risk of a radioactive leak. The Zaporizhzhia plant in southern Ukraine has been occupied by Russian troops since early March. On Saturday its Ukraine operator Energoatom said Russian troops had "repeatedly shelled" it over the past day. Petro Kotin accuses Russia of having "mined" the power units by storing heavy military equipment including tanks next to the power units. IMAGES AND SOUNDBITES