Trump administration on Iran: President Donald Trump said “the ‘big wave’ is yet to come in the war with Iran”. Meanwhile, US Defense Secretary Pete Hegseth called on Iranians to “take advantage” of the opportunity for regime change, even as he said the war was not about ousting the government in Tehran.

Expanding war with Iran: A top Iranian official said Tehran “will not negotiate” with the US. Israel and Hezbollah are trading blows as the conflict widens, while explosions have been heard in Gulf cities including Dubai, Abu Dhabi and Doha.  Fighter jets shot down: Three US fighter jets were accidentally shot down by Kuwaiti air defenses in an apparent “friendly fire incident,” according to the US military. All crews are in stable condition.

Global shockwaves: Qatar’s state-run energy company has stopped its production of liquefied natural gas following an Iranian attack on its facility, and Tehran has denied attacking an oil refinery in Saudi Arabia. The war has also disrupted air travel, with airspace closed in the Middle East. Four U.S. service members have been killed in action following the massive U.S.-Israel military operation launched in Iran Saturday that sparked swift retaliation.

State of play: U.S. Central Command confirmed that as of Monday morning the death toll had climbed to four after a service member seriously wounded during Iran’s strikes succumbed to their injuries. The deaths of three other U.S. service members were confirmed Sunday.