More covert US ops....a big FU to Putin. The deep state is betting that Putin won’t go to war though he knows perfectly well the US is behind this. Putin won’t comply with the deep state agenda so he has to go.
More likely Putin had it blown up to rally domestic support for his illegal annexation of occupied Ukraine and defend his continued conscription of Russians for his imperialist wars of aggression.
He did similar with the Moscow apartment bombings to support attacking Chechnya and just recently blowing up his gas pipeline to permit a Force Majure cutoff of European gas supplies.
Putin is as deep state as one can be. Just ask his pal Obama. He is so deep he has been able to cling to power for 23 years. But brave Russians oppose him.