"The ball is in their court," Ambassador Nikki Haley told reporters. "They shouldn't try and play at this point," AP wrote.

Read alsoPence warns North Korea of U.S. resolve shown in Syria, Afghan strikes – mediaHaley's comments followed President Donald Trump's recent statement that the U.S. wants peace – and that how much North Korean ruler Kim Jong Un also wants peace will be a deciding factor in easing tensions between the two countries.