Tensions rise as Russia accuses Ukraine of drone attacks on Kremlin.

Russia claims it foiled an attack by Ukrainian drones on the Kremlin early Wednesday, calling it an unsuccessful assassination attempt against President Vladimir Putin and promising retaliation for what it termed a “terrorist” act. The Ukrainian president denied it, saying: “We don’t attack Putin or Moscow.” The alleged drone attack would be a significant escalation in the 14-month conflict, with Ukraine taking the war to the heart of Russian power.