Caesar Kunikov

Day 721 of the invasion of Ukraine. Summary of key events in the last 24 hours:

An intelligence tip on a planned attack by the Islamic State on Russian ships passing through the Bosphorus Strait in Istanbul has prompted an escort by Turkish forces, local media reported on Tuesday.

A Russian naval intelligence ship sank off Turkey’s Black Sea coast on April 27 after colliding with a vessel carrying livestock, Turkey’s Coast Guard said, noting that all 78 personnel on board were evacuated.

The ship, identified as the Liman, collided with the Togo-flagged Youzarsif H., the authority said on its website.

A Russian naval intelligence ship sank off Turkey's Black Sea coast on April 27 after colliding with a vessel carrying livestock, Turkey's Coast Guard said, noting that all 78 personnel on board were evacuated.

The ship, identified as the Liman, collided with the Togo-flagged Youzarsif H., the authority said on its website.

Turkey is not involved in any plans to revise the Montreux Convention that regulates international access to the Bosphorus and the Dardenelles Straits, Foreign Ministry Spokesperson Tanju Bilgiç said on Dec. 8, refuting reports that the convention could be renewed amid ongoing tension between Ankara and Moscow.

Turkey accused Russia of a “provocation” on Sunday after a a Russian soldier on the deck of a naval ship allegedly held a rocket launcher on his shoulder while the vessel passed through Istanbul, according to Reuters.

A Russian warship passed through Istanbul's Bosphorus en route to the Mediterranean on the morning of Dec. 6, with one soldier seen in footage holding a ground-to-air missile, private broadcaster NTV has reported.

The soldier held the missile on his shoulder in the shooting position during the passing of Russia's Caesar Kunikov warship.