A drone attack has caused a fire in the port area of Ust-Luga by the Baltic Sea in Russia's northwest, injuring three workers, regional governor Aleksandr Drozdenko said on Telegram on Wednesday, Reuters reports.
He said that a power station was also cut off as a result of the attack, during which 150 drones were shot down over the Leningrad region that is also home to a major oil refinery and the city of St Petersburg, the hometown of President Vladimir Putin.
The Baltic States of Lithuania, Latvia and Estonia warned of a drone threat on Wednesday, and neighbouring Finland has adopted temporary partial airspace and maritime curbs, amid the attack.
Ust-Luga is a major oil, oil products and grain export outlet, along with other commodities.
Reuters could not immediately independently confirm the report.