Six construction workers were injured last week – four seriously – at a Brooklyn, New York worksite. According to news sources, the injuries occurred when a two-story brick building that was under construction collapsed after a load of cinder blocks was placed on its roof.

FDNY Assistant Deputy Chief Wayne Cartwright issued a statement that the roof couldn’t support the weight of the cinder blocks.

The injuries included a compound fracture to one of the worker’s legs, a hip injury, lacerations and abrasions. The workers were treated at local hospitals.