Massive protests erupted across Iran, including Tehran, Isfahan, Shiraz, and Mashhad, following a sharp decline in the national currency, the rial. The currency's plunge has led to soaring inflation and increased costs for essential goods, sparking widespread economic hardship. The head of Iran's Central Bank, Mohammad Reza Farzin, resigned amid the unrest. The protests occurred a day after a presidential remark about being in a 'full-scale war' with the US, Israel, and Europe, though the immediate trigger appears to be economic distress.