NKorea blows up roads connecting to SKorea

(UPDATE) SEOUL — North Korea blew up sections of the deeply symbolic roads connecting it to South Korea on Tuesday, Seoul's military said, adding that it had conducted a "counterfire" operation in response.

Pyongyang's armed forces last week vowed to permanently seal its southern border after spending months laying mines and building anti-tank barriers in the wake of leader Kim Jong Un declaring South Korea his country's "principal enemy."