Russia's Primorsk Port Hit by Drone Attack
First drone strike on major Russian oil export terminal.
Ukraine's drone attacks on Russian energy facilities surged since August.
Russia's air defense neutralized 221 drones, including 30 in Leningrad Oblast.
Pulkovo Airport in St. Petersburg temporarily halted flights due to drone threat.
Governor Alexander Drozdenko confirmed fire was extinguished without casualties.
No risk of flooding or oil spills at Primorsk site.
Attack highlights increased drone strikes on Russian energy infrastructure.