Fighting continues in Ukraine's eastern Donbas region and the southern city of Mariupol, as the Group of Seven vows to provide more military and economic aid to Kyiv. Meanwhile, the top Republican in the U.S. Senate, Mitch McConnell, paid an unannounced visit to Kyiv on Saturday. He met with Ukrainian President Volodymyr Zelenskyy for talks on defense, finance and sanctions against Russia. Russia's ambassador to the U.S. warned against closer cooperation with Ukraine, calling the situation in the region "extremely dangerous."