China rejects US assertion it is holding up North Korea progress

China's Foreign Ministry on Saturday expressed "serious concern" about U.S. comments on North Korea, after President Donald Trump cancelled his top diplomat's trip to Pyongyang and partly blamed China for a lack of progress in denuclearisation talks.

The ministry said in a statement that it made "stern representations" to U.S. officials, and that it would continue to play a positive role in working towards denuclearisation on the Korean peninsula.