Pyongyang has denied any involvement in the the Cold War-style assassination and accused the US and its allies of conspiring with Seoul to impugne its reputation.
"The US will keenly realize how dearly it has to pay for its groundless accusations against the dignified DPRK [Democratic People's Republic of Korea]," North Korea's Foreign Ministry spokesman told the KCNA state news agency, stressing that the regime opposed all forms of terrorism.
"Gone are the days, never to return, when the US could stigmatize at random to oppress those countries incurring its displeasure, while having the world under its control."
The exiled Kim Jong-nam, half-brother to the North Korean leader, was allegedly murdered at a Kuala Lumpur airport by two women — one Vietnamese and one Indonesian — who have since been arrested and charged by Malaysian authorities.
However, the only North Korean to have been detained over the incident, Ri Jong-chol, was released and deported Friday due to lack of evidence. He claimed that police had offered him a comfortable life in Malaysia in return for a false statement.
"But no way. No matter how good a life it could be, it is still not as good as my own motherland. How could I forget the motherland that raised me and fed me to this point?" he told reporters in Beijing.
North Korea was originally listed as a state sponsor of terrorism by the US in 1987 after its agents allegedly bombed a South Korean plane, killing all 115 on board.
