Predictably the North Koreans have stormed out of the joint liaison office at Kaesong:

North Korean officials withdrew from the inter-Korean liaison office in the border city of Gaeseong on Friday. 

Seoul’s Unification Ministry said that North Korean officials held a meeting with their South Korean counterparts in the morning to announce the decision. 

The North Koreans are said to have cited what they called an order from the upper levels of leadership. 

The 15 or so North Korean officials left with only their documents, while leaving behind equipment, noting they didn’t care whether South Korea continues to maintain its office and that they would be in contact with the South to resolve working-level matters. 

KBS World Radio

You can read more at the link, but remember that this is the liaison office that the ROK government spent $8.5 million to renovate.