Russian President Vladimir Putin met with U.S. envoys Steve Witkoff and Jared Kushner at the Kremlin on Saturday for talks to try to revive a stalled push to end the Russia-Ukraine war.

Putin, Kushner and Witkoff spoke for more than three hours in closed-door talks that come as both sides continue to escalate aerial attacks. Putin and Ukrainian President Volodymyr Zelenskyy both agreed to pause strikes on each other’s capitals while the talks took place.

Washington’s push to end the fighting has lost momentum as U.S. attention has been focused for the past six months on the Iran war. The last known visit to Moscow by Witkoff and Kushner, U.S. President Donald Trump’s son-in-law, was in January, when they also held talks with Putin at the Kremlin.

Both U.S. envoys will also visit Ukraine’s capital, Kyiv, for the first time in the peace process on Sunday, Ukrainian officials said. At the start of the meeting in Moscow, Putin asked Kushner and Witkoff to pass on his warm wishes and gratitude to Trump, and described the situation in Ukraine as “not simple.” Russian forces launched an all-out invasion of Ukraine on Feb. 24, 2022.

“(Russian President Vladimir) Putin has ordered that no strikes be carried out against Kyiv for three days, starting at midnight today,” presidential spokesperson Dmitry Peskov told Russia’s Tass news agency. Zelenskyy said that Ukraine was prepared to halt strikes on Moscow until Monday. He said he spoke Saturday with the U.S. delegation.“From now through the end of Saturday, as well as on Sunday and Monday, Ukraine is ready to refrain from strikes on Moscow, and we expect the Russians to do the same regarding Kyiv,” he said.