That is according to Reuters, citing its own sources, Ukrinform reports.

The Sheskharis terminal, which handles around 700,000 barrels per day of crude oil, is Russia's main oil export facility on the Black Sea. Its shutdown adds to pressure on Russian energy infrastructure, which has come under repeated attack in recent months.

The administration of Novorossiysk issued a fresh drone alert for residents on Friday, indicating a continued threat to the port area.

One tanker scheduled to load crude at the port left for open sea early on Friday following an attempted drone attack on the terminal, one of the sources said.

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As a result of the attempted attack, the port suspended crude loadings and stopped accepting oil into the terminal because storage tanks had reached capacity, the source added.

Novorossiysk handles exports of Russia's flagship Urals crude, Kazakhstan's KEBCO blend and Siberian Light oil.