Volodymyr Zelenskyy has said his meeting with Donald Trump ahead of the Pope's funeral could prove to be "historic" if it leads to peace in his country's war with Russia.
The Kremlin has blamed Ukraine for a car bomb that killed a Russian general near Moscow hours before Donald Trump's envoy was due to meet Vladimir Putin in the capital.
Luigi Mangione has pleaded not guilty to murdering a US healthcare chief executive - as prosecutors formally confirmed they plan to seek the death penalty for him.