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Ousted South Korean President Park Geun-hye arrives for questioning on her arrest warrant at the Seoul Central District Court March 30, 2017 in Seoul, South Korea. A hearing to determine whether an arrest warrant should be issued for former president Park Geun-hye will be held at the Seoul Central District Court. (Ahn Young-Joon-Pool-Getty Images)

North Korea threatened Wednesday to execute South Korea's former president Park Geun-Hye over an alleged plot to assassinate Kim Jong-Un, according to a statement pushed by officials and prosecutors in North Korea.

"We declare at home and abroad that we will impose the death penalty on traitor Park Geun Hye," the statement said, according to a report by The Guardian.

It alleged that Park had "pushed forward" with the attempted plot by Seoul's intelligence services. North Korea also said that former director of South Korea's National Intelligence Service (NIS), Lee Byung-Ho, would also be executed along with sympathetic groups.

The statement threatened the accused with a brutal "dog's death."

They "can never make any appeal even though they meet miserable dog's death anytime, at any place and by whatever methods from this moment," the statement read, adding that the accused ex-president and former director should be handed over as "organizers of the hideous international terrorist crimes."

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Park is currently in custody and on trial in Seoul for charges of bribery and abuse of power related to the corruption scandal that got her impeached in December 2016. The first woman president of South Korea, Park was voted to be impeached by the South Korean National Assembly. The vote was 234-56, with six abstentions, according to CNN.

"I solemnly accept the voices of the National Assembly and the people and sincerely hope that the current confusion will come to an end in an orderly manner," said Park.

"I will respond to the impeachment judgment of the constitutional court and the investigation of the special prosecutors, following the procedures set by the Constitution and the law with [a] calm mind-set and then will accept its decision," she added.

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South Korea intelligence agencies denied involvement and said that the North's accusations are without merit. In a statement, the South’s NIS said, “As we have repeatedly clarified, the North’s allegations are groundless.”

It added, “It is intolerable that the North openly threatens the lives of our people.”

In February, Kim Jong Un's estranged half-brother Kim Jong-Nam was killed by two women at Kuala Lumpur International Airport using a banned nerve agent. They were caught on camera.

One of the women shown applying the deadly nerve gas had "LOL" emblazoned on her shirt and stood in plain view of the camera. Malaysia and South Korea both blamed North Korea for the assassination. North Korea has denied any involvement.

In May, Pyongyang's ministry of state security said it stopped a plot by the US and South Korean spy agencies to kill Kim using a biochemical weapon.