A high-profile defector has announced that he launched balloons carrying anti-regime leaflets and USB flash drives loaded with K-pop toward North Korea, the first-known launch of its kind since South Korea’s constitutional court struck down a law banning such activity.

Park Sang-hak, the head of the activist group Fighters for a Free North Korea, stated in a press release on Monday that he launched 300,000 leaflets condemning DPRK leader Kim Jong Un’s rejection of peaceful unification, along with 2,000 flash drives containing K-pop and other South Korean music.