President Vladimir Putin's spokesman, Dmitry Peskov, said today that "mistakes happen," adding that the Russian military quickly corrected the error and punished the culprit.
The Defence Ministry yesterday backed its claim that the US has protected IS militants in Syria with images showing a convoy of vehicles.
The Bellingcat investigative group quickly noted that one of the images came from mobile phone game AC-130 Gunship Simulator, while the rest were taken from a 2016 video showing an Iraqi air force raid on IS.