The two oil tankers, identified as the Kairos and Virat, were empty and sailing to Novorossiysk, a major Russian Black Sea oil terminal.

An official from Ukraine’s security services said it has hit “shadow fleet” tankers in the Black Sea as they headed to a Russian terminal to load up with oil bound for foreign markets. Ukraine used domestically produced Sea Baby drones to strike off the Turkish coast,

In Russia, a major oil terminal near the port of Novorossiysk stopped operations Saturday after a strike by unmanned boats damaged one of its three mooring points, according to a statement from the Caspian Pipeline Consortium, or CPC, which owns the terminal.

Russian President Vladimir Putin has acknowledged U.S. proposals to end the war in Ukraine as a starting point for talks.

Ukraine has agreed to an updated US-brokered peace deal as Russia launches attacks on Ukraine's energy grid