Ukraine’s government on Tuesday promised to create shelters to provide heat and water and encouraged citizens to conserve energy as a harsh winter loomed amid relentless Russian strikes that have left its power structure in tatters. Special "invincibility centres" will be set up around Ukraine to provide electricity, heat, water, internet, mobile phone connections and a pharmacy, free of charge and around the clock, President Volodymyr Zelenskiy said in his nightly video address on Tuesday.