A swarm of Russian drones flew last week into Poland in what officials there regarded as a deliberate provocation.

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.

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

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

European Commission President Ursula Von der Leyen said on Tuesday that she had a call with U.S. President Donald Trump on strengthening joint efforts to increase economic pressure on Russia through additional measures.

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

Turkish media said that Moscow had approached Ankara with a proposal to buy back the S-400 systems delivered in 2019 in a deal that caused ructions in the NATO alliance and prompted the U.S. to expel Turkey from its F-35 fighter jet program.

Russia denied responsibility, implying that the drones had simply lost their way; NATO and European officials suggested the violation was intentional. Whatever the case, the clash marked the first time that NATO engaged enemies in allied territory.