"To identify the air target and prevent it from violating the state border of Russia, a MiG-31 fighter from the air defense forces of the Eastern Military District was taken into the air," RIA Novosti reported.
As noted, the crew of the Russian fighter identified the aerial target as a US Air Force B-1B strategic bomber.
Violations of the state border of Russia were not allowed.
Earlier, a Russian Su-27 fighter jet escorted a US Air Force aircraft over the Black Sea.