North Korea leader Kim Jong-un was on a train to Vietnam on Sunday for his second summit with President Donald Trump.

Mr Kim was accompanied by Kim Yong-chol, who has been a key negotiator in talks with the US, and Kim Yo-jong, the leader’s sister, the North’s official Korean Central News Agency reported.

TV footage and photos distributed by the North’s state-run news agency showed Mr Kim inspecting a guard of honour at the Pyongyang station before waving from the train.

Late on Saturday, an Associated Press reporter saw a green-and-yellow train similar to one used in the past by Mr Kim cross into the Chinese border city of Dandong via a bridge.

The Trump-Kim meeting is slated for Wednesday and Thursday in Hanoi.