Major North Korean websites disappeared from the internet on Tuesday after losing access to Russian routers, outages that one expert said may also be connected to electricity shortages.

The websites of the propaganda outlet Naenara and the DPRK Portal went offline between 5:01 and 5:02 a.m. KST Tuesday for 15 and 25 minutes, respectively, the web-monitoring service Pingdom shows. 

The websites of the DPRK’s foreign ministry and the Korean Central News Agency, as well as the country’s email services, all went offline between 5:02 a.m. and 5:07 a.m. KST for 10-15 minutes each.