Residents of Ukraine’s second-largest city, Kharkiv, are facing rolling blackouts as Russia continues a wave of strikes against Ukraine’s energy infrastructure. On Sunday, Russia hit an underground oil gas storage site. Meanwhile, Ukrainian forces are continuing to attack Russian oil refineries despite a warning not to do so from the United States. The Financial Times reports the Biden administration fears the attacks inside Russia could drive up oil prices and provoke retaliation. Ukraine also hit two more Russian ships and a communications center used by Russia’s Black Sea Fleet.