American UH-60 Blackhawk helicopters (“Black hawk”), according to the aircraft tracking portal flightradarflying from Romania towards Odessa.
As noted in the message, three helicopters belonging to the US Army are escorting an unidentified aircraft. The cover task is performed by the EP-3E Aries II electronic intelligence aircraft, equipped with electronic warfare systems. The end point of the route and the purpose of the air group are unknown.
Recall that earlier, in August, EP-3E Aries II Orion were already seen on the border of Romania and the Odessa region. Then the reconnaissance aircraft cruised over the Romanian part of the Black Sea, without crossing the Ukrainian border.