Russia launched a wave of attacks on Ukraine's capital, Kyiv, overnight, with at least seven people killed in strikes that hit city buildings and energy infrastructure. A Ukrainian attack on southern Russia killed three people and damaged homes, authorities said.

The attacks came during a renewed U.S. push to end the war that has raged for nearly four years and talks about a U.S. peace plan. Army Secretary Dan Driscoll met with Russian officials for several hours in Abu Dhabi on Tuesday, a U.S. official told 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 settlement with Russia.

The U.S. official, who spoke on condition of anonymity to discuss sensitive negotiations, declined to give details on how long the negotiations would last or what topics were being discussed, but noted that the Ukrainians were aware of the meeting and all sides have indicated they wanted to reach a deal to halt the fighting as quickly as possible.

Ukraine's President Volodymyr Zelenskyy said late Monday that “the list of necessary steps to end the war can become workable” after progress was made in Sunday's talks between U.S. and Ukrainian delegates in Geneva. He said he planned to discuss “sensitive” outstanding issues with President Donald Trump.

Rustem Umerov, a senior adviser to Zelenskyy, wrote on social platform X on Tuesday that the Ukrainian leader hoped to finalize a deal with Trump “at the earliest suitable date in November.”

Russian officials have been reserved in their comments on the peace plan. Russian Foreign Minister Sergey Lavrov said Tuesday that Moscow is in touch with American officials about peace efforts.

"We expect them to provide us with a version they consider an interim one in terms of completing the phase of coordinating this text with the Europeans and the Ukrainians,” Lavrov said.

European leaders have cautioned that the road to peace will be long.