The Iran-backed group had accused US ally Saudi Arabia of a "dangerous escalation" after Riyadh struck Houthi targets in Yemen on Friday. A Yemeni security source told AFP a naval base in the port city of Hodeida and a military camp on Kamaran Island were among the Saudi targets. This week the Houthis announced a maritime blockade of the top oil exporter, hitting Saudi tankers in the Red Sea. The US did not announce strikes on Iran, a first after 13 nights of consecutive bombardments. I think they're getting more and more serious as the days go by, for maybe the obvious reason," Trump told journalists.