‌Russia’s Primorsk and Ust-Luga ports on the Baltic ​Sea suspended oil and fuel loadings on March 22 following drone attacks, two sources said on Monday. A ‌fuel reservoir ‌at ​Primorsk ‌caught ⁠fire ​after a ⁠drone attack, Alexander Drozdenko, the governor of the northwestern Leningrad region, said on the Telegram ⁠messaging app on ‌Monday.

Ust-Luga ‌was closed ​due to ‌a drone alert ‌in the area, the sources said.

Primorsk and Ust-Luga ports are both ‌located in the Leningrad region and handle ⁠the ⁠majority of crude oil and fuel exports from Russia’s west.

Oil pipeline monopoly Transneft, which operates both ports, did not immediately reply to a ​request ​for comment.