North Korea has blown up a joint liaison office with the South near the North’s border town of Kaesong amid growing tension in the region.
The latest act of aggression form Pyongyang comes just hours after the North renewed threats of military action at the Korean border.
The site was opened amid fanfare in 2018 to help the Koreas – officeially in a state of war – to communicate more effectively.
Responding to the attack, South Korea warned it would “respond strongly” if the North “continues to worsen the situation”.
The destruction of the office, it said, “abandons the hopes of everyone who wanted the development of inter-Korean relations and peace settlement in the Korean Peninsula”.
“The government makes it clear that all responsibility of this situation lies in the North.”
Tensions between North and South Korea have been escalating for weeks, prompted by defector groups in the South sending propaganda across the border, BBC writes.
The North Korean leader’s sister, Kim Yo-jong, had threatened at the weekend to demolish the office.
Her brother, Kim Jong-un, has ruled North Korea as Supreme Leader since 2011 after the death of his father and former ruler, Kim Jong Il.
There were hopes for improved relations between the North and the South and its close ally the United States after Donald Trump met Mr Kim at the North-South border last June, but nothing materialised and the atmosphere has since deteriorated.
The US has not yet commented on the North’s latest act of aggression.