A Ukrainian drone attack in southwestern Russia killed two people and parts of Ukraine went without power following Russian assaults on energy infrastructure, authorities said Saturday, as U.S.-led peace talks were about to restart on Sunday.

Foreign policy advisers from the U.S., Ukraine and Germany, among others, will meet in Berlin, German news agency dpa reported. Germany is set to host Ukrainian President Volodymyr Mr. Zelenskyy on Monday, part of efforts by European leaders to steer the negotiations.

For months, American officials have tried to navigate the demands of each side as President Donald Trump presses for a swift end to Russia’s war and grows increasingly exasperated by delays. The search for possible compromises has run into major obstacles, including the possession of U

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