• President Moon Jae-in of South Korea issued a blunt rebuke to the United States, the latest sign that President Trump’s “fire-and-fury” approach to North Korea was putting new strain on the longstanding alliance.

“No one should be allowed to decide on a military action on the Korean Peninsula without South Korean agreement,” Mr. Moon said in a nationally televised speech.

Pyongyang appeared to walk back its threat to launch ballistic missiles toward Guam, saying it would wait to assess “the foolish and stupid conduct” of the United States.