Iranian Supreme Leader Ayatollah Ali Khamenei has been killed in a US-Israeli attack, sparking celebrations in Iran and raising questions about the future of the regime.

Following a joint attack by the US and Israel on Iran, India is calling for restraint and de-escalation to avoid further military confrontation in the Middle East.

Airports across the country have been placed on operational alert to manage potential flight diversions, unscheduled landings and passenger facilitation requirements.