Israel appeared to be expanding its air campaign against Tehran five days after its surprise attack on Iran’s military and nuclear program, as U.S. President Donald Trump posted an ominous message warning residents of the capital to evacuate.

Iran’s allies, the self-described “Axis of Resistance,” have been severely hurt by ongoing Israeli attacks since the Oct. 7, 2023, Hamas attack on Israel, particularly Lebanon’s Hezbollah and Hamas in the Gaza Strip. Iran has long used those groups as both an asymmetrical way to attack Israel and as a shield against a direct assault.