The European Commission will delay presenting its next Russia sanctions package, EU officials said on Tuesday, as the bloc tries to respond to the Trump administration's demand that it play a stronger role in depriving Russia of energy revenues.

The Geran-3, modeled after the Iranian-made Shahed-238, is faster and more advanced than its predecessor.

"By attempting to disclose classified information on U.S. Air Force systems to the Russian government, John Rowe endangered American lives and compromised U.S. national security," said Assistant Director Roman Rozhavsky of the FBI's Counterintelligence Division.

Russia's oil pipeline monopoly Transneft has warned producers they may have to cut output following Ukraine's drone attacks on critical export ports and refineries, three industry sources said on Tuesday.

Ukrainian drones have struck one of Russia’s largest oil refineries, sparking a fire, Russian officials and Ukraine’s military said Sunday. The overnight strike on the Kirishi refinery, in Russia's northwestern Leningrad region, follows weeks of Ukrainian attacks on Russian oil infrastructure that Kyiv says fuels Moscow’s war effort.

Ukraine is struggling to defend itself against the growing number of attack drones that Moscow has started using in its onslaughts.

On the border with Russia, Lithuania's Defence Ministry has launched the first of what will be nine schools around the country teaching children as young as 10 and adults how to fly, assemble, and programme drones.

Denmark is leading a military exercise with hundreds of troops from several European NATO members in Greenland.

U.S. President Donald Trump said that a sticking point in the prospects of talks between Vladimir Putin and Volodymyr Zelensky is the level of enmity between them. Trump suggested that he would have to be an intermediary for the leaders of Russia and Ukraine because they "hate each other so much they almost can't talk.