27 May 2014 :

the Tokyo Shimbun daily reported that North Korea had deported or executed several officials and engineers over the deadly collapse of a new high-rise apartment building in Pyongyang on 13 May. 
Quoting a source in the North, the daily said four design and construction engineers were executed by firing squad and a military official in charge of the project was sent to a prison camp. 
The newspaper also reported rumors in Pyongyang that the death toll in the collapse might be as high as 500 people. 
Another Japanese newspaper, Yomiuri Shimbun, reported that the 23-story building was inhabited by high-ranking intelligence and police officials.