"The 'Ivanovets' missile boat, which was fulfilling tasks in the waters of the Black Sea, has been sent to the area where the Ukrainian fishing vessel OD-2592 is located (four crew members on board, registered in Ochakiv). The crew [the Ukrainian ship] asked for assistance at 01:27, July 3, 2021 [22:27, July 2, GMT]," the centre said in a statement.
The Ukrainian vessel is said to face an engine failure and is on a drift now. Russia has informed Ukraine about the incident.