Jan 20 (Reuters) - A Russian air attack cut power to more than one million Kyiv residents and impacted substations carrying power from Ukraine's atomic plants on Tuesday, prompting Ukraine to warn that Moscow was using the risk of nuclear disaster as a tool of coercion.
Moscow has stepped up a winter campaign against Ukraine's battered energy system while grinding forward on the battlefield, as Kyiv faces U.S. pressure to secure peace after nearly four years of war, amid scant signs the Kremlin wants to stop fighting.
