According to the portal, the aircraft with tail number 61-2670 was located above Chita.
US Air Force Observation Plane Boeing OC-135B # Open # Skies, tail number 61-2670, callsign # OSY12F, in the coverage area of the receiver in Chita, UIAA. pic.twitter.com/wyGJY02mh9
It is noted that the flight was made under the Treaty on open skies.
In late January, it was reported that a Russian Su-27 fighter was raised to intercept an American reconnaissance aircraft P-8A Poseidon.