President Donald Trump's national security adviser says the USA has a military option for North Korea, but that is not its preferred route.
The United Nations reacted strongly after North Korea tested a weapon analysts say has the explosive power of 250 kilotons of TNT, passing the new sanctions on September 11.
McMaster says recently imposed United Nations sanctions on North Korea are just taking effect.
"We're out of time", White House National Security Adviser General H.R. McMaster said. "I personally think he slaps the right people, he hugs the right people, and he comes out with the U.S. being very strong in the end", said U.S. Ambassador to the U.N. Nikki Haley.
McMaster encouraged the rigorous enforcement of the global sanctions, adopted Monday, in an effort to exhaust all efforts to confront "this global problem short of war".More news: Lights still out for 5.8 million USA customers after Irma
McMaster stressed Friday that the U.S.is still trying to resolve the conflict diplomaticcaly.
"In the words of North Korea, we have strangled their economic situation at this point".
Since President Trump threatened North Korea with "fire and fury" in August, the North has conducted its most powerful nuclear test, threatened to send missiles into the waters around the U.S. Pacific island territory of Guam and launched two missiles of increasing range over Japan. "They continue to be provocative".
"For those who have said and who have been commenting on a lack of a military option, there is a military option", he said at the White House briefing, though he noted that it was not the administration's preferred route for dealing with the nation's aggressiveness. The new sanctions, coupled with those before them, now ban over 90 percent of North Korea's publicly reported 2016 exports - including coal, textiles, iron and seafood, but not revenues from overseas workers.