A “window for peace is opening” in Ukraine, China’s top diplomat told a meeting of G20 foreign ministers on Thursday, as the Trump administration ramps up its push to end the war in close coordination with Russia.

Moscow’s forces are three miles from Dnipropetrovsk, a province they have never invaded. If they cross in, the advance would be a morale blow to Ukraine and complicate any territorial negotiations.

Russia and the United States have had their first meeting since the start of the Ukraine war, aimed at restoring relations and preparing the ground for ending the conflict.