1. Two pro-Russian groups in Mariupol said that they 'felt betrayed' by the action taken in Geneva.

2. During the night of 16 April, about 300 pro-Russian protesters attacked a Ukrainian military unit in Mariupol, throwing petrol bombs.

3. An international incident occurred on 25 November 2018 when the Russian Federal Security Service (FSB) coast guard fired upon and captured three Ukrainian Navy vessels attempting to pass from the Black Sea into the Sea of Azov through the Kerch Strait on their way to the port of Mariupol.