13 August, 2017
A White House readout of the call said two leaders had agreed that "North Korea must stop its provocative and escalatory behaviour" and that new United Nations sanctions on Pyongyang were "an important and necessary step" towards peace and stability on the Korean Peninsula.
The UN Security Council last weekend backed a punishing new round of sanctions against North Korea following the test-firing of two intercontinental ballistic missiles, which experts believe could be capable of hitting the USA mainland.
"Force has always been an option, but it has always been the last option, not the first", Soderberg said.
"And we work very closely with allies to ensure that this is not unilateral either ... and of course there's a military solution", Mattis said yesterday. "But we don't see this as potentially hitting us in any way because it is directed towards an outer island in the Pacific itself", Padilla told reporters.
Earlier in the week, Mr Trump threatened to rain "fire and fury" on Pyongyang. He described the prospect of war as "catastrophic" and added that diplomatic efforts to solve the North Korea nuclear crisis were yielding results.
The US is "the mastermind of nuclear threat, the heinous nuclear war fanatic", the report said. "'Nobody loves a peaceful solution better than President Trump".
North Korea retaliated by releasing potential plans to strike the USA territory of Guam in the Western Pacific, however U.S. diplomats say a dialogue is being pursued and Americans should "sleep well" at night.
There has been no indication that any actual attack on the Pacific island is imminent.
Media captionThe BBC's Robin Brant asks those in the South Korean capital, Seoul: "Are you scared?"
"While standing by 24 hours in preparation for a launch, we are calling on our residents to be on alert in case we issue emergency information", Makoto Ebuchi added.
But he once again suggested that he expected China to "do a lot more" to bring North Korea into line.