SEOUL, South Korea (AP) — South Korea says North Korea blew up the northern parts of inter-Korean roads no longer in use. Tuesday’s action came after the rivals exchanged threats of destruction amid rising animosities over North Korea’s claim that South Korea flew drones over its capital. The roads’ demolition is a display of North Korea’s growing loathing of South Korea’s conservative government. South Korea’s Joint Chiefs of Staff gave no detail on the demolition of the roads north of the border Tuesday. South Korea’s military said it is bolstering its readiness and surveillance posture in coordination with the United States. North Korea has a history of staging choreographed destruction of facilities on its soil as a political message.