The risks of nuclear war are "considerable" over the Ukraine conflict, Russia's foreign minister says, as he accuses NATO of waging a proxy war through Kyiv.
Pope Francis has urged leaders to hear the people's plea for peace in Ukraine and implicitly criticised Russia for dragging the country into a "cruel and senseless" conflict.
Ukrainian President Volodymyr Zelensky has threatened to withdraw from the ongoing peace talks with Russia if Ukrainian fighters trapped in the port city of Mariupol are killed by the Russian forces besieging the city.