North Korean leader Kim Jong-un's uncle Jang Song-taek was executed right after a military tribunal on Thursday, the official KCNA news agency said on Friday.
"The tribunal examined Jang's crimes. All the crimes committed by the accused were proved in the course of the hearing and were admitted by him," it said.
The execution came four days after Jang was arrested and hauled out of a Politburo meeting. "The accused is the worst traitor to the nation of all time who perpetrated anti-party, counter-revolutionary factional acts in a bid to overthrow the leadership of our party and state and the socialist system," the report said.
"From long ago, Jang had a dirty political ambition. He dared not raise his head when Kim Il-sung and Kim Jong-il were alive. But... he began revealing his true colors, thinking that it was just the time for him to realize his wild ambition in the period of historic turn when the generation of the revolution was replaced."
KCNA quoted Jang as saying in the tribunal that he planned to take the post of prime minister when the right time came, namely when the North Korean economy completely collapsed and the state was on the verge of disintegration.
Jang confessed he thought if he could relieve hardship with the vast slush funds he had amassed, the people and military would support him and a political change would succeed, it added.