Kremlin has tightened security around Putin. Surveillance installed in staff homes. Movement restrictions amid fears of assassination or coup. December 2025 assassination of Fanil Sarvarov in Moscow. Putin met with security officials after assassination. Gerasimov criticized Bortnikov over protection failures. Putin spends time in Krasnodar bunkers. Federal Protective Service expanded protection to 10 commanders. Communication bans on presidential staff. Shoigu linked to coup risk via military influence. Tsalikov arrested on March 5. Anxiety rose after Ukraine's 'Spiderweb' drone operation. Battlefield losses exceed 30,000 monthly