KYIV, Ukraine —

Russia launched a wave of attacks on Ukraine on Tuesday, killing at least six people in overnight strikes that hit city buildings and energy infrastructure, while a Ukrainian attack in southern Russia killed three people and damaged homes, authorities said.

The large-scale attacks come during a renewed U.S. push to end the war that has raged for nearly four years and talks about a U.S.-brokered peace plan. Army Secretary Dan Driscoll met with Russian officials for several hours in Abu Dhabi on Tuesday, a U.S. official confirmed to The Associated Press.

Driscoll, who became part of the U.S. negotiating team less than two weeks ago, is heading up the latest phase of talks involving the terms of a possible peace plan with Russia.

The U.S. official, who spoke on condition

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