Vladimir Putin, the 73-year-old Russian president, has reportedly begun spending nights inside the heavily fortified Kremlin in Moscow, gripped by fears of an assassination similar to that of Iran's supreme leader Ali Khamenei last month.
Sources close to Russia's security services say the change started in recent weeks amid a widespread mobile internet blackout across the capital. The measures, allegedly prompted by concerns over hacked surveillance systems, represent a significant escalation in the leader's personal security.
