Minjoo said, "I got a tip on 'Pyongyang drone infiltration, direct order from the National Security Office'."

The Democratic Party of Korea raised suspicions that the National Security Office ordered the drone operation command directly over the North's alleged infiltration of a "South Korean drone" into Pyongyang in October.

The fact-finding team of the party's civil war issued a press release and reported that the National Security Office skipped the Ministry of National Defense and the Joint Chiefs of Staff, which are official command systems.

He added that the military is believed to have prepared to maneuver drones since June to respond to North Korean filth balloons that began in May, adding that suspicions have been raised that the new security chief Shin Won-sik has been involved since August.

The fact-finding team urged the Joint Investigation Headquarters to quickly launch an investigation into the National Security Office and others to find out the truth and to find out the suspicions of concealing related records.