BEIJING (Reuters) - China’s Foreign Ministry on Saturday expressed “serious concern” about U.S. comments on North Korea, after President Donald Trump canceled his top diplomat’s trip to Pyongyang and partly blamed China for a lack of progress in denuclearization 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 denuclearization on the Korean peninsula.