The leaders of the two nations have engaged in a series of bizarre tit-for-tat insults over the last year, with Tillerson previously admitting that military intervention in North Korea was a possibility. North Korea’s efforts to develop its ballistic missile program has raised tensions on the Korean peninsula, while the country’s supreme leader Kim Jong-Un has eyed the US mainland as a potential “nuclear strike zone.”

READ MORE: ‘Mine is bigger’: Trump dares Kim Jong-un to compare nuclear buttons

Amid the threatening rhetoric, the US government has maintained sanctions against The Hermit Kingdom, with which it has no official diplomatic ties. In an interview with CBS 60 Minutes scheduled to air Sunday, Tillerson said that while communication channels are open, the US will continue its current approach.

Asked what methods were being used to encourage peaceful talks, Tillerson said that the US strategy is to continue applying pressure. “We’re not using a carrot to convince them to talk, we’re using large sticks and that is what they need to understand. This pressure campaign is having its bite on North Korea,” he added.

“It is my job as chief diplomat to ensure that the North Koreans know we keep our channels open. I’m listening, I’m not sending a lot of messages back because there is nothing to say to them at this point,” he said.  

READ MORE: Pence raises prospects for talks with North Korea, sanctions to continue

The strategy has so far seen US President Donald Trump threaten North Korea with ‘fire and fury,’ while frontline staff like Vice President Mike Pence have expressed a desire for direct talks.

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