Over a dozen large shelters that could house North Korea’s largest nuclear missiles appeared on Wednesday afternoon outside a central Pyongyang square, where a military parade looked set to take place in the coming hours, according to NK Pro analysis of satellite imagery.

An informed source in the capital told NK Pro that authorities began closing off streets around Kim Il Sung Square around the same time Wednesday, while satellite imagery showed other signs of an imminent parade and no strong evidence that an event had already taken place. 

If each shelter conceals a