Why are you presenting it as a fact when the article says
Movements of planes used by top Kremlin officials show Putin may be in a hideaway near Surgut in western Siberia, it is claimed.
Also "it is claimed" by the Ukrainian side. Do you have any Russian sources to corroborate this?
They dont link it directly
Some Western intelligence assessments have suggested the plane was shot down by a missile from Ukraine, although they could not confirm the presence of POWs on board.
A French military official told The Associated Press that the country’s military concluded that Ukrainian forces used a battery of Patriot surface-to-air missiles to shoot down the Il-76, firing from about 50 kilometers (about 30 miles) away.
The official, who spoke on condition of anonymity to divulge the intelligence findings, said the Ukrainian battery apparently managed to stay hidden while getting closer to the target and then switched on its radar “just long enough to hit them.”
Another Western official also said the plane was downed by “a missile strike rather than any kind of mechanical failure,” and it’s almost certain the missile was fired from Ukrainian territory. The official said “it’s not yet clear” whether it was carrying Ukrainian POWs.
It doesn't support that assertion at all. It's highly speculative based on flight movements and a lack of response from russia lol
Also if you take lack of response from the other side as a confirmation, then oh boy have you checked what the RT and TASS are saying about the war?