So here's what happens when a regional conflict decides to go sightseeing. Two drones decided to pay an unwelcome early morning visit to the U.S. embassy in Riyadh on Tuesday, according to Saudi Arabia's defense ministry. The result was a limited fire and some material damage—the kind of housewarming gift nobody wants.

Witnesses reported a loud blast and saw flames at the compound in the diplomatic quarter, with black smoke doing its best impression of a bad omen over the part of town that houses multiple foreign missions. The good news, if you can call it that, is that the building was apparently empty at that hour, and no injuries were reported. The not-so-good news is that the U.S. Mission to Saudi Arabia immediately told Americans in Riyadh, Jeddah, and Dhahran to "shelter in place" and avoid the embassy "until further notice." When your landlord sends that kind of alert, you know it's not about a plumbing issue.

This isn't an isolated incident. Think of it as the diplomatic version of dominoes falling. Since Saturday's U.S.-Israeli attacks on Iran, Iran's missile and drone campaign has been making its feelings known by targeting or threatening U.S. interests and partners across the Gulf. It's the geopolitical equivalent of a very loud, very dangerous argument that's spilling into the neighbor's yard.

And the neighbors are getting nervous. Reuters reported smoke near the U.S. Embassy in Kuwait City just a day earlier, after Kuwaiti defenses decided to have a conversation with some incoming drones. Over in Pakistan, things got even messier. Authorities told the Associated Press that protesters supporting Iran clashed violently with security forces in Karachi and northern Pakistan, leading to at least 22 deaths and over 120 injuries. Some of those demonstrators tried to storm a U.S. Consulate on Sunday, while others in the north took their frustrations out on U.N. and government offices. It's a reminder that when major powers throw punches, the shockwaves can hit unexpected places.

Attacks on U.S. facilities in this part of the world, sadly, have a long resume. There was the 2004 assault on the U.S. consulate in Jeddah and the 1998 bombings of U.S. embassies in Kenya and Tanzania. History has a way of repeating itself, especially when tensions are high.

And tensions are certainly high. The U.S.-Israeli air campaign against Iran expanded on Monday with no clear end in sight. Israel also struck Lebanon after Hezbollah launched attacks, while Iran continued its focus on Gulf states that host American military bases. President Donald Trump said the operation could last for weeks. He also noted that Iran's leadership looked uncertain after U.S. and Israeli forces killed Supreme Leader Ayatollah Ali Khamenei in the opening hours of the weekend campaign. When the top of the pyramid gets removed, everyone below starts wondering who's next in line—and what they're going to do about it.