A Russian drone struck the locomotive of a Kyiv-Warsaw passenger train approximately two kilometers from the Polish border at Yahodyn station on September 13, shortly after a diplomatic train carrying former UK Prime Minister Boris Johnson, former CIA director David Petraeus, and EU security advisers departed the same station [3][7][20]. A separate drone set fire to a gas station and trucks near the Yahodyn-Dorohusk border crossing, one of Ukraine's busiest EU freight gateways [5][14][18]. The strikes formed part of a mass overnight assault involving more than 450 drones and missiles across ten Ukrainian regions that killed at least six people and injured over 40 [4][7][24][36]. Poland activated Article 4 NATO consultations and scrambled F-16 fighters after Polish systems detected Geran-5 jet-powered drones, one striking one kilometer from the border and another five kilometers away [28][35][37].

Polish Prime Minister Donald Tusk warned that "the coming weeks and months will be a period of very intensive actions on the Russian side" and that Poland "cannot rule out that this escalation will also affect our territory" [7][11]. Polish Foreign Minister Radoslaw Sikorski said the strikes landed "just a few hundred meters from the Polish border" and called for allies to "double our efforts to support victims of aggression" [2][20]. Ukrainian Foreign Minister Andrii Sybiha described the strikes as "Putin's terror knocking directly on the doors of the EU and NATO," adding: "Russian barbarians are at your gate, dear partners" [3][7][24]. Estonian Foreign Minister Margus Tsahkna, whose delegation had crossed at Yahodyn shortly before the strike, said Russia "is already a threat to all of Europe" [9][17]. Boris Johnson said he did not "know what warped logic drove Putin to blow up a stationary Ukrainian locomotive on the Polish border" and called for Ukraine to receive air defenses and for frozen Russian assets to be transferred to Ukraine [3][20].

Russian President Vladimir Putin, speaking at a BRICS summit in India, denied any Russian threat to Europe and accused European ruling elites of "preparing for war with Russia" [8][23]. Russia's UN ambassador Vasily Nebenzya said the drones used had a maximum range of 700 kilometers and "physically cannot reach Polish territory" [46]. Russian chargé d'affaires in Poland Andrei Ordash rejected attribution, saying "there is no evidence that this UAV is Russian" [48]. US President Donald Trump said the drones "might have been a mistake" [46], while Secretary of State Marco Rubio called the incursion "unacceptable" but said it was not yet clear whether it was deliberate [46]. EU High Representative Kaja Kallas described it as "the most serious Russian violation of European airspace since the start of the Ukraine war" with indications pointing to an intentional act [48].

Russia's Defence Ministry stated that its strikes targeted "railway infrastructure used to transport military cargo from European countries" and logistics centers supplying military equipment, along with energy facilities sustaining them [1][16][22]. Kremlin spokesman Dmitry Peskov said Russia "did not strike everything indiscriminately" but began doing so after Ukrainians "opened Pandora's box" [25]. Zelensky said Russia "has expanded the war away from the front, where they have no success, into the economy" with the tactic of "destroying every site that could help people cope with the conditions of war" [12][24]. The mass assault struck two major steel plants — Zaporizhstal in Zaporizhzhia, hit by four ballistic missiles, and ArcelorMittal Kryvyi Rih, where two contractor employees were killed [24][31]. Metinvest chief operating officer Oleksandr Myronenko said Zaporizhstal "produced only civilian pig iron and steel and hosted nothing that could make it a military target" and that "the scale of destruction is increasing with every strike" [31]. In Odesa, a missile hit a 25-storey apartment building wounding 37 people, with two reported killed [4][30], and the Kramatorsk city council said Russian forces attacked private cars, killing three people, insisting "these are not military targets" [12].

Russian officials and outlets presented Ukrainian retaliatory strikes as attacks on civilian infrastructure. The mayor of Tolyatti, Ilya Sukhih, said several residential buildings were damaged and one person hospitalized in a Ukrainian drone attack [4][12]. The mayor of Nizhnekamsk, Radmir Belyayev, reported Ukrainian drones killed two people [47]. Russian state outlet Lenta.ru reported that a Ukrainian sea-drone attack on Sochi caused civilian casualties including children [39]. The Russian-managed directorate of the Zaporizhzhia Nuclear Power Plant said Ukrainian forces struck the plant's training facility with drones ten times, reporting no casualties and normal radiation levels [29]. Ukrainian forces reported striking a synthetic-rubber plant in Tolyatti used for missile fuel components, chemical enterprises in Samara and Perm, and a drone launch site in occupied Donetsk [4][33]. In Bulgaria, an explosion at an Emko munitions depot led the company to allege sabotage, with Bulgarian politicians raising possible Russian involvement [42].

Trump called on Zelensky to "stop knocking out diesel fuel in Russia," saying the Ukrainian strikes were causing a diesel shortage and that "there are plenty of other targets" [2][6][7]. The demand linked the war's economic effects to US domestic fuel prices above six dollars a gallon [2][25]. Peskov said Russia "does not rule out" resuming trilateral talks with Ukraine and the United States in October, though he called a Putin-Zelensky meeting at the December G20 in Miami "impossible" and said any such meeting would have to take place in Moscow [6][10][15]. Zelensky said he was ready to meet Putin at the G20 and proposed an air and sea ceasefire as a first step [4][8]. US special envoy Jared Kushner said he hoped to announce "the next steps" within weeks following visits to Moscow and Kyiv [15][34]. Russian Foreign Minister Sergey Lavrov said Russia is "ready for negotiations" but that its "special military operation" would not be suspended during any talks [23]. China's UN envoy Geng Shuang called on all parties to "remain calm and restrained" and resolve disputes through dialogue [46].

Reader commenters on Japan Today questioned the attribution of the drones to Russia, with one writing that there was "no evidence that drone was a russian one" and another alleging the incidents were "concocted by the US military-industrial complex and British intelligence to justify sending ever more weapons to Ukraine" [10].

Poland's Article 4 consultations remain under way, with NATO having reinforced its eastern flank under Operation Eastern Sentry and the EU preparing a sanctions package targeting approximately 1,600 additional persons and organizations for mid-October [27][35]. The Ukrainian Air Force reported that nearly 1,000 drones were fired at Ukraine in 24 hours, largely toward western regions [15], while Ukrzaliznytsia described a "systemic attack on the rail network" under way across the country [15][16]. Tusk said a CIA briefing from director John Ratcliffe had provided Poland with a detailed report on the possible evolution of events in the coming months [41].