In a June 1 covert operation dubbed "Spiderweb," the Security Service of Ukraine (SBU) destroyed or damaged 41 Russian warplanes at four air-bases across the Russian Federation—Belaya (Irkutsk oblast, Siberia), Olenya (Murmansk oblast, in the Arctic), Dyagilevo (Ryazan oblast, near Moscow) and Ivanovo (in the eponymous oblast, also near Moscow). Kyiv claims it has disabled 34% of Russia's strategic bomber fleet in the operation, carried out with over 100 drones launched from trucks hidden across Russian territory. While the Kremlin's top officials, including President Vladimir Putin, have not commented on the Ukrainian operation at all, Russian pro-war propagandists are calling it "Russia's Pearl Harbor," and demanding vengeance. Prominent state TV personality Vladimir Solovyov said on his program that the Ukrainian operation is "grounds for a nuclear attack," and called for retaliatory strikes on the Ukrainian president's office in Kyiv and airfields in NATO members Poland and Romania allegedly used by Ukrainian aircraft. (Kyiv Independent)

Also June 1, seven were killed when a passenger train derailed in Russia's Bryansk oblast, near the border with Ukraine, after a bridge collapsed as a result of an explosion—possibly in a drone strike. A second bridge reportedly collapsed in Kursk oblast, also on the Ukrainian border and recently retaken by Russian forces following a Ukrainian incursion launched last year. (DW)

Meanwhile, as Russian nuclear threats escalate, so do Russian air-strikes on Ukrainian cities.