US President Donald Trump has cancelled a summit with North Korean leader Kim Jong-un, saying the world had “lost a great opportunity for lasting peace”.
He said his decision was because of “tremendous anger and open hostility” in a recent North Korean statement.
In a letter to Mr. Kim, he said he was still looking forward to meeting him “some day”.
It came hours after North Korea said it had dismantled tunnels at its only nuclear test site.
Foreign reporters at the Punggye-ri site in the north-east said they had witnessed a huge blast.
According to BBC News, Mr. Trump said he had been looking forward to the now-cancelled summit in Singapore on June 12.
“I was very much looking forward to being there with you. Sadly, based on the tremendous anger and open hostility displayed in your most recent statement, I feel it is inappropriate, at this time, to have the long-planned meeting,” Mr. Trump said.
“You talk about your nuclear capabilities, but ours are so massive and powerful that I pray to God they will never have to be used,” he added.
Mr. Trump ended his letter by saying Mr. Kim should call him if he changed his mind.