Bangladesh, Jan. 31 -- United Nations, Jan 31 (AP/UNB) - The U.N. humanitarian chief urged Syria's warring parties on Wednesday to ensure the delivery of desperately needed aid to Syrians stranded near the border with Jordan and warned again that a major military operation in extremist-controlled Idlib would be a humanitarian catastrophe.

Mark Lowcock said the U.N. wants an aid convoy, with more than 100 trucks accompanied by some 250 U.N. and Syrian Arab Red Crescent personnel, to leave for the isolated Rukban camp on the Syria-Jordan border by Feb. 5. Its 42,000 people "remain stranded in deteriorating conditions since the last convoy to the area in early November," which was the first since January 2018, he said.

Lowcock also appeale...