Ukrainians who fled their war-torn country should not return this winter because Ukraine's energy system — damaged by a wave of Russian attacks — cannot cope, Ukraine's deputy prime minister said Tuesday.A number of recent Russian strikes have targeted energy infrastructure, resulting in widespread power outages, according to Ukrainian officials."Russian terror against our energy facilities is aimed at creating as many problems as possible with electricity and heat for Ukraine this fall and winter so that as many Ukrainians as possible move to European countries."The deputy mayor of Lviv, Serhiy Kiral, also told CBS News partner network BBC News that Russia's strategy was to bring the war beyond frontline areas by damaging critical infrastructure ahead of the winter.An adviser to Zelenskyy, Oleksiy Arestovych, said there was no sign Russian forces were leaving the area, and Ukraine's intelligence chief said Russia was sending more troops to the region and preparing to defend it, BBC News reported."