United Nations Secretary-General António Guterres called on all sides “not to escalate” the volatile situation in the Red Sea, his spokesman said on Friday after Washington and London launched strikes on Yemen’s Houthi rebels. The barrage of strikes early on Friday against the Houthis, who say they are acting in solidarity with Gaza, follow weeks of disruptive rebel attacks on Red Sea shipping and has stoked fears of the war in the strip spreading regionwide. “The secretary-general further calls on all parties involved not to escalate even more the situation in the interest of peace and stabil…