North Korea accused American and South Korean intelligence services on Friday of plotting to assassinate Kim Jong-un with "biochemical substances."

The allegation was made by the North's ministry of state security and published by state-run media.

The North claimed that the CIA and South Korea's IS — Intelligence Service — "hatched a vicious plot" targeting Kim while he appeared in public in Pyongyang for ceremonial events. North Korea regularly makes allegations about the West. Its accuracy not be immediately verified by USA TODAY.

North Korea said a terrorist group helped coordinate the failed plot.

"The murderous demons of the IS who conspired with the CIA ideologically corrupted and bribed a DPRK citizen surnamed Kim, the then worker of the timber industrial branch in the Khabarovsk Territory of Russia in June 2014, and turned him into a terrorist full of repugnance and revenge," the North's security agency said.