The russian defense ministry claimed publicly that the ucranian military was preparing what it called a terrorist attack on the plant. The ukranian military intelligence agency said no, the rRussian warning was itself a pretext for russia to stage some kind of provocation. Two out of the four power lines into and out of the plant have already been destroyed. If those generators get taken out by shelling at some stage, the plant would be at risk of releasing radioactive omissions.