The Saudi Arabia-led coalition fighting the Iran-backed Houthi rebels in <a href="https://www.thenationalnews.com/tags/yemen/" target="_blank">Yemen</a> said it detected an imminent danger to navigation and global trade south of the Red Sea, Saudi state media reported early on Monday. The coalition said hostile movements and activity by the <a href="https://www.thenationalnews.com/mena/2021/11/21/fall-of-marib-would-end-yemen-political-process-and-cause-humanitarian-disaster/" target="_blank">Yemeni Houthi forces</a> using explosive-laden boats had also been detected. Measures were being taken to neutralise the threat and ensure freedom of navigation, it said, without going into details. The Iran-backed group has repeatedly targeted international shipping using speedboats rigged with explosives as well as drones and rockets. In October, the coalition said it had destroyed numerous craft being prepared with explosives for attacks against commercial shipping. The <a href="https://www.thenationalnews.com/mena/2021/11/20/yemen-urges-us-to-increase-political-pressure-on-houthi-rebels/" target="_blank">US and other international powers</a> have repeatedly expressed growing concern at the Houthi tactic, pointing out that a significant proportion of global energy supplies and large quantities of trade pass through Bab Al Mandeb between Yemen and Djibouti as ships head for the Suez Canal and the Mediterranean. On Sunday, the coalition's air defences destroyed a drone targeting Najran airport in the south of Saudi Arabia, state media reported. Debris from the destroyed drone, launched from Sanaa airport in Yemen, was scattered in a residential area but no injuries were reported, Saudi state TV said. There were also heavy air strikes on more than a dozen Houthi targets around Sanaa carried out by coalition jets on Sunday. It was the latest in almost daily drone attacks by Houthi rebels that targeted the kingdom. <i><b>This is a developing story…</b></i>