At least half a dozen North Korean websites and email servers dropped off the internet last weekend in a sign of growing instability of the country’s IT infrastructure.

The server outage on Saturday night disrupted access to the websites of Air Koryo, the Ministry of Foreign Affairs, the Naenara web portal, Kim Il Sung University, as well as the email servers for Sili Bank and Star Joint Venture, cybersecurity researcher Junade Ali told NK News.