The State Department’s top North Korea envoy on Wednesday said that Pyongyang is ignoring US overtures for talks and could be planning its first nuclear weapon test in nearly five years for its April 15 holiday.

According to news agency Reuters, Sung Kim, the Special Representative for North Korea Policy, said Washington thinks Pyongyang could be planning a big show of its growing nuclear weapons capacity on the annual holiday next week, which will celebrate the 110th anniversary of the birth of Kim Il Sung, who founded the modern Democratic People’s Republic of Korea (DPRK).

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Speaking to reporters, Kim said, “We are worried that in connection with the upcoming April 15 anniversary, the DPRK may be tempted to take another provocative action.” This comment comes after North Korea’s recent ballistic missile test launches.

“I don’t want to speculate too much, but I think it could be another missile launch, it could be a nuclear test,” he said.

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Starting 2006, North Korea has tested nuclear weapons several times, and its last test was in 2017.

“Pyongyang has continued to ignore Washington’s overtures to resume discussions about removing all nuclear weapons from the Korean peninsula,” Kim said.

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“We have not received any response from Pyongyang, which is very disappointing, because we have sent several messages, both public and private, inviting them to a dialogue without any conditions,” he said.

The Special Representative also said that China and Russia were not helping President Joe Biden’s push to restart talks with North Korean leader Kim Jong Un.

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Talks aimed at containing Pyongyang’s nuclear threat appeared to gain traction under the previous US administration of Donald Trump, but then stopped.

After Biden took office, North Korea began a series of missile tests, 13 in all, that culminated last month with the test of a ballistic missile that could potentially deliver a nuclear warhead to the eastern United States.

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The tests have alarmed North Korea’s immediate neighbours South Korea and Japan.