MOSCOW: Ukraine's dramatic drone attack on Russian bombers over the weekend has increased the risk of escalation to "unacceptable" levels, said US envoy Keith Kellogg. "The risk levels are going way up,

Russia's ambassador to the UK has warned that Ukraine's drone attacks on airbases for nuclear bombers risk bringing the conflict to 'World War 3' - but expressed doubt about one thing

U.S. President Donald Trump's Ukraine envoy said the risk of escalation from the war in Ukraine was "going way up" after Ukrainian forces used drones to strike nuclear-capable bombers at several airbases deep inside Russia.