Iran could try to “target” US government officials if Iranian leaders believe “the stability or survivability” of their regime is at risk, according to a new Department of Homeland Security bulletin obtained by CNN.

Israel hit Iranian government targets in Tehran on Monday in a series of strikes that followed a salvo of missiles and drones fired by Iran at Israel in the wake of the Trump administration’s massive strikes on Iranian nuclear sites the day before.

Israel’s Defence Ministry says its military is now striking Iranian government targets in Tehran, including the notorious Evin Prison in the Iranian capital. Other targets include the security headquarters of the paramilitary Revolutionary Guards,

Israel is looking to wrap up its campaign in Iran soon and has passed the message on to the United States, according to three Israeli officials, though much depends on its adversary's next move.