The Latest: UN humanitarian chief welcomes Idlib agreement

BEIRUT (AP) — The Latest on development in Syria(all times local):
10:45 p.m.
The U.N. humanitarian chief is welcoming the Russia-Turkey agreement on the last rebel-held stronghold in Idlib, saying if fully implemented it may avert “the catastrophe” of a military onslaught creating “the worst humanitarian tragedy of the 21st century.”
But Mark Lowcock told the the U.N. Security Council on Tuesday that “to succeed, demilitarization requires the agreement of all