DUBAI, United Arab Emirates (AP) — Iran struck the U.S. Embassy in Saudi Arabia’s capital with a drone early Tuesday as it kept hitting targets around the region, while the United States and Israel pounded Iran with airstrikes in what U.S. President Donald Trump suggested was just the start of a relentless campaign that could last more than a month.

The attack from two drones on the U.S. Embassy in Riyadh caused a “limited fire” and minor damage, according to Saudi Arabia’s Defense Ministry, and the embassy urged Americans to avoid the compound. It followed an attack on the U.S. Embassy in Kuwait, which announced Tuesday it had been closed until further notice. The U.S. State Department also ordered the evacuation of non-emergency personnel and family in Kuwait, as well as Bahrain, Iraq, Qatar, Jordan and the United Arab Emirates as a precaution.