North Korea will withdraw from the inter-Korean liaison office because Seoul has not done enough to stop groups from sending anti-Pyongyang leaflets on balloons into the DPRK, a spokesperson from the Workers' Party department overseeing relations with South Korea said Friday night.

The statement follows a warning on Thursday from Kim Yo Jong -- a top North Korean official and the sister of leader Kim Jong Un -- that the North would shut down the liaison office or even tear up the two-year-old inter-Korean military agreement if the South didn't swiftly crack down on the balloon launches.