Poland and Ukraine on Sunday denounced Russian drone strikes close to the Polish border, including on a Warsaw-bound train and near a frontier checkpoint, characterizing the attacks as an "escalation" in the war.
Ukraine's rail operator said former British prime minister Boris Johnson and ex-US CIA director David Petraeus were at a border train station nearby around the time the train was hit. A truck near Ukraine's border with Poland was also struck during the Russian drone strikes on the region.
Ukraine's Foreign Minister Andrii Sybiha characterized the attack as a sign of Russia's escalating campaign of "terror" against the European Union and NATO. Polish and Ukrainian officials confirmed the attack on the truck near the border on Sunday.
The strikes came as US President Donald Trump called on Ukraine's President Volodymyr Zelensky to halt attacks on Russian refineries, saying the campaign was causing a shortage of diesel fuel and that "there are plenty of other targets." Ukraine has increasingly targeted Russian oil refineries in a bid to hurt Russia's war effort.
The Russian attacks occurred just days after US envoys visited Kyiv and Moscow in a bid to revive talks to end Europe's worst conflict since World War II. At the BRICS meeting in New Delhi, President Vladimir Putin did not rule out resuming three-way talks between Russia, Ukraine and the US in October.
Fresh Russian strikes in close proximity to NATO sites have stoked fears among some European leaders that the war between Ukraine and Russia is spilling across borders. European nations are meanwhile worried by what they say is increased Russian-orchestrated sabotage acts on their soil.