The Russian military on Wednesday threatened to strike “decision-making centers” in Kyiv if Ukrainian forces continue attacks across the border in Russia.

The warning comes as Russia has begun to stage its forces just across the Ukrainian border for the next phase of Russian President Vladimir Putin’s “special military operation” in Ukraine. The capital city of Kyiv has hosted several foreign leaders in recent weeks, and Ukrainian President Volodymyr Zelensky has refused to leave Kyiv since the start of Russia’s invasion.