North Korean leader Kim Jong Un will launch a special investigation to find a link between espionage and several failures of Musudan-type missile launches, a defector-led research institute claimed on Friday.

Kim Jong Un suspects that a series of failed launches may stem from covert actions by the U.S. Central Intelligence Agency (CIA) and South Korea’s National Intelligence Service (NIS), North Korea Intellectuals Solidarity (NKIS) said, citing an unnamed high-profile source familiar with the North Korean situation.