The Russian military said Tuesday that it had “drastically” reduced its activity near the Ukraine capital of Kyiv and the northern city of Chernihiv as talks with Ukraine aimed at ending the war entered the “practical” stage.

Russia and Ukraine held face-to-face talks Tuesday in Turkey as the United Nations pressed for a cease-fire in Russia’s brutal invasion. The talks took place in the Turkish presidential office in Istanbul and lasted more than three hours, Russia’s Tass agency reported.

Alexander Fomin, Russia’s deputy minister of defense, said the military cutbacks were made to “increase mutual trust and create conditions for further negotiations.”

President Joe Biden, who had a call with European leaders Tuesday morning to discuss aiding Ukraine and pressuring Russia to end the war, was asked about the Russian claim of a military cutback near Kyiv.

“We’ll see,” he said.

The Pentagon sounded even more skeptical, as press secretary John Kirby said the pullout of troops was small and they may be reassigned.

“We’re not prepared to call this a retreat or even a withdrawal,” Kirby said in a news briefing. “We think what they probably had in mind is a repositioning to prioritize elsewhere.”

Ukraine’s military said it had detected withdrawals around the cities, and U.S. Gen. Tod Wolters, commander of the U.S. European Command, said that is “exactly what we see.” The Russian advance on Kyiv had stalled in recent weeks, but missile strikes have battered the city and left shortages of food, water and other necessities for a population of almost 3 million people.

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The head of the Ukrainian delegation, David Arahamiya, said his side presented an official proposal for a new system of security guarantees. The proposed security pledge will not apply to the parts of Ukraine whose status remains in dispute – Crimea, which Russia considers its territory after annexing it in 2014, and the breakaway Donetsk and Lugansk areas.