Ukrainian drones were reportedly active over the Leningrad region, impacting Pulkovo Airport in Saint Petersburg, according to social media reports from September 12th, 2025. The "Carpet" regime, which grounds all air traffic, was reportedly implemented at Pulkovo Airport. Simultaneously, approximately a dozen UAVs were reportedly shot down near Moscow. The new source indicates Ukrainian drone activity extended to the "so-called Leningrad region," with Pulkovo Airport being affected and placed under the "Carpet" regime. This follows a period of heightened tensions and cross-border activity, including Poland closing its border with Belarus on the night of September 11th, 2025, in response to the "Zapad-2025" exercises. Earlier, on September 11th, Ukrainian drones struck the Kardymovo oil depot in Russia's Smolensk region. Polish Prime Minister Donald Tusk stated on September 11th that Poland would defend its territory against any attacks, referencing a previous violation of Polish airspace by Russian drones. France deployed three Rafale fighter jets to Poland, and NATO doubled its fighter presence over the country. Latvia also closed its airspace along its borders with Russia and Belarus as a precaution. Sweden announced an $836 million military aid package for Ukraine on September 11th, 2025.