According to CNN with reference to the representative of the European Command of the US Armed Forces, Russ Wolfkiel, the plane was collecting intelligence.
Exactly what information the United States collected is unknown.
It is noted that the flight was carried out with the permission of the Ukrainian authorities and the plane did not cross the borders of the self-proclaimed Luhansk and Donetsk People's Republics.
Earlier, the National Defense Control Center of Russia reported that a Russian Su-30 fighter was escorted by a Poseidon P-8A reconnaissance aircraft of the US Navy over the Black Sea.
An American plane was approaching the Russian state border.