In a symbolic display of anger, North Korea blew up the northern sections of unused road and rail routes that once linked it with South Korea on Tuesday. The rivals exchanged threats days after the North claimed that the South flew drones over its capital Pyongyang.

The choreographed demolition underlines North Korea’s growing anger against South Korea’s conservative government. North Korean leader Kim Jong Un has vowed to sever relations with South Korea and abandon the goal of achieving peaceful Korean unification.