Oil hits $100 a barrel for first time since July after US and Houthi strikes

"If a vessel enters that area without co-ordination, it will be subject to our sanctions," he said.When asked by reporters about the latest tit-for-tat strikes, US Secretary of State Marco Rubio said on Tuesday that the situation was "pretty straightforward"."Iran continues to try to hit US naval ships. And, for every time they do that or try to do that, they're going to lose tankers. And I think you'll see that again today," Rubio told reporters during a trip to Colombia.The US strikes on Tuesday came hours after Iran's Navy said it had seized an uncrewed US submarine in the Strait of Hormuz.US Navy Capt Tim Hawkins, a spokesperson for Centcom, said an "underwater drone operated by US forces malfunctioned more than a day ago" and that it had been used to survey regional waters.Saudi Arabia and the Houthis, an Iran-backed group that controls much of north-western Yemen, have also been exchanging fire.Following a wave of air strikes on Sunday and Monday, the Houthis accused Saudi Arabia of bombing a prison in Hazm. The group's military spokesman Yahya Sarea said on Wednesday that the bodies of 23 civilians had so far been pulled from the rubble.On Tuesday, the Houthis launched dozens of drones and missiles at civilian and economic sites in the southern Saudi cities of Abha, Khamis Mushait, Jazan and Najran, injuring 73 civilians, according to Saudi authorities.