North Korea's official Korean Central News Agency is reporting a "serious" accident this past week at a construction site in Pyongyang, with "casualties" but no death toll mentioned.
The unusual report on Sunday morning said the accident in Phyongchon district occurred on Tuesday "as the construction of an apartment house was not done properly and officials supervised and controlled it in an irresponsible manner".
The report said the rescue operation ended on Saturday and that officials apologised to bereaved families and district residents.
The KCNA report cited one official as saying North Korea's young leader Kim Jong Un "sat up all night, feeling painful after being told about the accident".
The highly controlled state media for the reclusive regime rarely report news that might be considered negative.