Did you guys notice how Russia is handling accusations? They always go into denial and lying in your face followed by threats. If you do this we will do that. It's the only language they know.
When that civilian plane was shot down over the Ukraine by a Russian AA they immediately denied having these launchers in that area, even though there were satellite images available and the Ukrainians were filming those same missile platforms in transit and posting them on youtube. And not long ago they conducted military exercise near Swedish coast and are flying their jets close to the UK air space.
Russia has no ethics or to be more precise - Russian elite ,which have been running this country for decades now, dont care about anyone or anything besides doing everything to avoid loosing their grip on their weatlh.
That includes slaughtering innocent civilians In Ukraine or other countries.
But they are not stupid, they do not want all out war, it is too big of a risk to lose their power in short time period.
They need to keep their people brainwashed and fearful, otherwise they will start to notice problems in their own country.
Also they are using any means necessary to gain more control over free world media and people.