U.S. diplomat warns to be 'prepared for the worst' right after N. Korean official reportedly shuts down diplomacy

Deputy Secretary of State John Sullivan told reporters on Tuesday that while the State Department remained focused on quelling tensions with North Korea through diplomatic channels, that the nation and world must remain prepared for the possibility that those efforts will fail. 

"We must, however, with our allies in Japan and South Korea and elsewhere, be prepared for the worst should diplomacy fail,” Sullivan said, according to the Associated Press

The comments come fresh off a report from CNN claiming a North Korean official said that the country is no longer interested in diplomacy until it develops the capabilities to build a long-range (ICBM) capable of hitting the East coast of the United States. 

"Before we can engage in diplomacy with the Trump administration, we want to send a clear message that [North Korea] has a reliable defensive and offensive capability to counter any aggression from the United States," the North Korean official reportedly told CNN.

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As tensions rise, North Korea stages mass rally in Pyongyang
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As tensions rise, North Korea stages mass rally in Pyongyang
A view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
Servicepersons of the Ministry of People's Security met on August 10, 2017 to express full support for the Democratic People's Republic of Korea (DPRK) government statement, in this photo released on August 11, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT.
A general view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.??
Servicepersons of the Ministry of People's Security met on August 10, 2017 to express full support for the Democratic People's Republic of Korea (DPRK) government statement, in this photo released on August 11, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. TPX IMAGES OF THE DAY
A general view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.??
A general view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.??
People participate in a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
People participate in a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
A general view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.
A view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
A view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
TOPSHOT - This picture taken on August 11, 2017 and released by North Korea's official Korean Central News Agency (KCNA) on August 12, 2017 shows North Korean youths and workers and trade union members holding a rally to protest the UN Security Council's 'sanctions resolution' at the compound of the Monument to Party Founding in Pyongyang. Nearly a week ago, the UN Security Council unanimously passed fresh sanctions against Pyongyang over its weapons program, including export bans, a new punishment that could cost North Korea $1 billion a year. / AFP PHOTO / KCNA VIS KNS AND AFP PHOTO / STR / South Korea OUT / REPUBLIC OF KOREA OUT ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT 'AFP PHOTO/KCNA VIA KNS' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS THIS PICTURE WAS MADE AVAILABLE BY A THIRD PARTY. AFP CAN NOT INDEPENDENTLY VERIFY THE AUTHENTICITY, LOCATION, DATE AND CONTENT OF THIS IMAGE. THIS PHOTO IS DISTRIBUTED EXACTLY AS RECEIVED BY AFP. / (Photo credit should read STR/AFP/Getty Images)
This picture taken on August 11, 2017 and released by North Korea's official Korean Central News Agency (KCNA) on August 12, 2017 shows North Korean youths and workers and trade union members holding a rally to protest the UN Security Council's 'sanctions resolution' at the Youth Park Open-Air theatre in Pyongyang. Nearly a week ago, the UN Security Council unanimously passed fresh sanctions against Pyongyang over its weapons program, including export bans, a new punishment that could cost North Korea $1 billion a year. / AFP PHOTO / KCNA VIS KNS AND AFP PHOTO / STR / South Korea OUT / REPUBLIC OF KOREA OUT ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT 'AFP PHOTO/KCNA VIA KNS' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS THIS PICTURE WAS MADE AVAILABLE BY A THIRD PARTY. AFP CAN NOT INDEPENDENTLY VERIFY THE AUTHENTICITY, LOCATION, DATE AND CONTENT OF THIS IMAGE. THIS PHOTO IS DISTRIBUTED EXACTLY AS RECEIVED BY AFP. / (Photo credit should read STR/AFP/Getty Images)
A view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
This picture taken on August 10, 2017 and released by North Korea's official Korean Central News Agency (KCNA) on August 11, 2017 shows service personnel of the Ministry of People's Security at a rally in support of North Korea's stance against the US, in Pyongyang. / AFP PHOTO / KCNA VIA KNS / STR / South Korea OUT / REPUBLIC OF KOREA OUT ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT 'AFP PHOTO/KCNA VIA KNS' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS THIS PICTURE WAS MADE AVAILABLE BY A THIRD PARTY. AFP CAN NOT INDEPENDENTLY VERIFY THE AUTHENTICITY, LOCATION, DATE AND CONTENT OF THIS IMAGE. THIS PHOTO IS DISTRIBUTED EXACTLY AS RECEIVED BY AFP. / (Photo credit should read STR/AFP/Getty Images)
A view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.?
This picture taken on August 10, 2017 and released by North Korea's official Korean Central News Agency (KCNA) on August 11, 2017 shows service personnel of the Ministry of People's Security at a rally in support of North Korea's stance against the US, in Pyongyang. / AFP PHOTO / KCNA VIA KNS / STR / South Korea OUT / REPUBLIC OF KOREA OUT ---EDITORS NOTE--- RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT 'AFP PHOTO/KCNA VIA KNS' - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS THIS PICTURE WAS MADE AVAILABLE BY A THIRD PARTY. AFP CAN NOT INDEPENDENTLY VERIFY THE AUTHENTICITY, LOCATION, DATE AND CONTENT OF THIS IMAGE. THIS PHOTO IS DISTRIBUTED EXACTLY AS RECEIVED BY AFP. / (Photo credit should read STR/AFP/Getty Images)
A general view shows a Pyongyang city mass rally held at Kim Il Sung Square on August 9, 2017, to fully support the statement of the Democratic People's Republic of Korea (DPRK) government in this photo released on August 10, 2017 by North Korea's Korean Central News Agency (KCNA) in Pyongyang. KCNA/via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THIS IMAGE. NO THIRD PARTY SALES. SOUTH KOREA OUT. NO COMMERCIAL OR EDITORIAL SALES IN SOUTH KOREA.??
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Sullivan's remarks came after a meeting with his Japanese counterpart, Shinsuke Sugiyama, where they two discussed rising tensions in the region. They are scheduled to travel to South Korea to continue those discussions and the U.S. and South Korea hold joint naval drills this week.

North Korea escalated its rhetoric against the United States and the world on Monday, telling the United Nations member states in a statement to not join any U.S. military efforts against North Korea if they wish to remain safe from violent retaliation. 

Over the weekend, Secretary of State John Tillerson said that he intends to continue diplomatic efforts with North Korea until "the first bomb drops." 

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