Offensive operations by Russia’s army have increased across the front line, according to social media posts by Ukrainian officers, an analysis of information from the General Staff in Kyiv and soldiers speaking to CNN.

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More than 150 Chinese citizens are fighting in Ukraine alongside the Russian army, which is massing on the border of Ukraine ahead of a huge spring offensive, according to Ukrainian President Volodomyr Zelenskyy.

Ukrainian President Volodymyr Zelenskiy accused Russia on Thursday of working systematically in China to recruit fighters for its war in Ukraine, days after announcing Ukrainian forces had captured two Chinese men fighting for Moscow.