UN envoy "gravely concerned" over U.S. airstrikes in, around Yemen's fuel port

ADEN, Yemen, April 20 (Xinhua) -- UN Special Envoy to Yemen Hans Grundberg on Sunday voiced his grave concern over recent U.S. airstrikes in and around the Ras Isa fuel port northwest of Yemen's Red Sea city of Hodeidah. "Echoing the (UN) Secretary-General (Antonio Guterres), I am...