US State Department's notice on Lu's departure says top diplomat's tenure concluded on 17 January
"I expect in their time here that they will spend longer than they normally would," says minister
We have overcome impasse with US govt, says Colombian Foreign Minister Luis Gilberto Murillo
Report provides no initial conclusions about what may have caused plane to land without its landing gear deployed
FM Araghchi praises countries' economic, trade and political relations in his talks with Afghan counterpart Muttaqi
Opposition hails indictment; Yoon denies insurrection accusation and vows to fight back