SEOUL: North Korea's Kim Yo Jong, the leader's powerful sister, accused UN chief Antonio Guterres on Tuesday of adopting a "prejudiced and irresponsible attitude" after he called for renewed dialogue with the South.

Guterres last week expressed concerns about a potential escalation on the Korean peninsula, calling on Pyongyang and Seoul "to resume communication channels, including on the military-to-military level, to avoid unintended accidents or miscalculations", according to UN spokesman Stephane Dujarric.

Tensions between the two Koreas, which remain technically at war, have soared since a landmine explosion along their heavily fortified border in September wounded three South Korean soldiers.