Two MiG-31BM supersonic high-altitude interceptor-fighters will enter service with the Central Military District’s fighter air regiment stationed in the Krasnoyarsk Region in Eastern Siberia by the end of 2019 after their repairs and upgrade. This reported by TASS citing the District’s press office statement.

"During the factory repairs with the upgrade, the aircraft’s avionics and radio-electronic systems were renewed and the interceptors’ tactical characteristics were improved, which boosted their combat potential," the press office said in a statement.

After the interceptor-fighters arrive at the military airfield, they assume combat duty to protect Russia’s airspace, the statement says.