The US envoy for North Korea has returned from Pyongyang.
Stephen Biegun had was there to hold talks in preparation for a second US-North Korean leadership summit.
After three days in discussions, US officials said Biegun would meet his counterpart again soon.
US President Donald Trump recently confirmed that he would meet North Korea's Kim Jong-un in Vietnam, on 27-28 February.

Fire at orphanage in Algiers kills 11
Former Italian motorway boss sentenced over Genoa bridge tragedy
Iran, US escalate in Gulf but release of American signals path to climb down
US to change visa regulations for foreign students, journalists
