Ukrainian President Volodymyr Zelenskyy on Wednesday postponed all scheduled foreign visits for several days, as Russian forces continued to push into the northeastern Kharkiv region.
Zelenskyy was due to travel to Spain and Portugal later this week, but called off the visits following a call with military leaders.
Fighting remained intense in the town of Vovchansk, according to local officials. A capture of the town near the Russian border would represent a major gain for Moscow.
Russia's Defense Ministry said Wednesday afternoon that it had captured two more settlements in Kharkiv, Hlyboke and Lukyantsi, as it ramps up its offensive in the region.
In other news, Russia's President Vladimir Putin has pitched the West and what he called "U.S.-led Western elites" as a mutual enemy of Russia and China, ahead of a two-day visit to Beijing where he will meet President Xi Jinping.
Putin and Xi have deepened Sino-Russian ties over recent decades and have held more than 40 meetings with each other since 2010.