Rosmorrechflot, Russia's Federal Agency for Sea and Inland Water Transport, shared in a Telegram post on Sunday that an investigation was underway over an explosion that happened on the Koala oil tanker in Ust-Luga port west of St. Petersburg.
The blast happened in the engine room, as per preliminary information. Rosmorrechflot added that the crew was evacuated and no one was injured. It further added that there was no "spill of the cargo or a leak of oil products."
It was also mentioned that oil spill containment booms were installed around the tanker, with authorities to now inspect "the underwater part of the vessel."