Israel struck Evin prison in northern Tehran on Monday, a potent symbol of Iran's governing system, in what Israel called its most intense bombing yet of the Iranian capital a day after the United States joined the war.

Israel picked up the pace of its attacks on Iran on Monday, targeting the regime's notorious Evin prison as well as the headquarters of the Iranian Revolutionary Guard, among other targets. Iran is still working on a response to the U.

Israel ratcheted up attacks on Iran even as Tehran vowed to retaliate against US strikes on its nuclear facilities over the weekend, fueling fears of a wider war in the Middle East and rattling global markets.