North Korean leader Kim Jong Un has travelled to China over a newly opened bridge, his first known trip abroad in more than a year, according to South Korean officials.

Mr Kim arrived on Saturday in the Chinese border city of Dandong, in Liaoning province, after taking a train from Pyongyang to the North Korean city of Sinuiju and crossing the New Yalu River Bridge, a South Korean government source told the Yonhap news agency.

Chinese premier Li Qiang met him there, Reuters reported, citing another South Korean official.

The trip was not announced in advance, and neither Pyongyang nor Beijing had confirmed it by Saturday evening. China's foreign ministry did not immediately respond to a request for comment.

The visit comes a day before China marks the anniversary of its entry into the 1950-53 Korean war on the North's side.…