Ukrainian media coverage on September 12 highlighted a significant overnight drone attack on Russia, with 221 drones reportedly hitting various targets, including a ship ablaze in Primorsk port. Simultaneously, intense combat continued on the front lines, particularly in the Pokrovsk sector. By late morning, reports focused on SBU drones successfully targeting Russia's largest oil loading port on the Baltic Sea. Russia, in turn, launched missile strikes on Sumy Oblast. The day concluded with President Zelensky announcing the complete thwarting of Russia's offensive on Sumy, while NATO launched "Eastern Guardian" in response to the drone attack on Poland. However, reports from Deep State in the evening indicated Russian forces were advancing into Kupyansk via a gas pipeline.