 Ukrainian Su-27s were recorded performing low fly passes and were reported flying top cover, combat air patrols and eventual escort or intercept of civil aviation traffic over Eastern Ukraine.On 15 April 2014, a video purportedly showing a Ukrainian Su-27 being shot down was released, but the video proved to be a hoax, taken from a previous video of the Syrian Civil War involving a different aircraft model.Videos taken of low-flying Su-27s involved in the operation revealed they were armed with R-27 and R-73 air-to-air missiles.