A month ago the militia complained of Ukrainian fighter jets trying to trick them into downing passenger planes. Explained in video from 18th of June.
Not sure if this can be verified. Surely the Russians are closely monitoring the airspace and if this is true, would be able to produce radar evidence of this happening. If true, Ukraine would be guilty of using air liners as 'human shields'. If the video is fabricated and is part of the a plan to eventually down an airliner to discredit Ukraine, then it would be a very serious crime.