Yemen risks being dragged further into the military escalation in the Middle East, amidst Israel’s ongoing war on Gaza and Lebanon, the U.N. special envoy for Yemen said Tuesday, warning it could spiral out of control. Hans Grundberg told the U.N. Security Council that Yemen is part of the escalation, adding that repeated attacks on international shipping by its Houthi rebels “have significantly increased the risk of an environment disaster” in the Red Sea. Both Grundberg and the U.N.’s acting humanitarian chief Joyce Msuya urged the Houthis to halt their attacks on international shipping, whi…