Israel's attack on Iran in the early hours of Friday marks the most severe attack on the Islamic Republic since the end of the Iran-Iraq war in 1988.
International observers, analysts, energy monitors, politicians and ordinary people in Iran and Israel are still scrabbling to come to terms with the significance of the operation, branded "Rising Lion" by Israel.
The fear among regional leaders, in particular, is that the escalation of the conflict between the two longstanding rivals could draw in neighbouring countries.
Meanwhile, the International Atomic Energy Agency (IAEA) has expressed concern over potential radioactive contamination as a result of the strikes on nuclear facilities.
With events still unfolding, Middle East Eye takes a look at what we know so far.
