North Korea's United Nations ambassador on Thursday met with a senior United Nations official who made a recent trip to Pyongyang to push for talks on ending the crisis over the reclusive country's nuclear and missile tests.
Citing a foreign ministry spokesperson, the North's KCNA news agency said a naval blockade would be a "wanton violation" of the country's sovereignty and dignity, adding that North Korea was a responsible nuclear power. It was not immediately clear what US proposal the agency was referring to.
The White House has declined to say whether President Donald Trump, who has taken a tougher rhetorical line toward North Korea, approved Tillerson's overture.
In November, North Korea claimed they successfully tested a new type of intercontinental ballistic missile equipped with a "super-large heavy warhead" capable of striking the USA mainland.
And as most Americans get into a happy zone for the holiday season, Graham is suggesting we could be closer than anyone realizes to a hot war with North Korea. "North Korea is acting in an unsafe way not only toward Japan, China and South Korea, but the entire world", While White House press secretary Sarah Sanders said this week.
In an attempt to force North Korea to abandon its banned nuclear and ballistic programs, the UN Security Council has decided on various sets of sanctions.
Graham said the issue of North Korean aggression "comes up all the time" when he talks to the president, including during their latest round of golf.
Mr Tillerson said on Tuesday the United States was "ready to talk anytime North Korea would like to talk", appearing to back away from a key U.S. demand that Pyongyang must first accept that any negotiations would have to be about giving up its nuclear arsenal.
Speaking at a news conference, Foreign Secretary Boris Johnson said: "We don't want to see a military solution. we want to see an intensified diplomatic effort".
So far, the United States has argued that any negotiations can only be about the denuclearization of the Korean peninsula.