Casey Kauffman, Al Jazeera's reporter in Dhaka, said: "The workers were massing rubble on a certain part of the roof as they were knocking down the top of the building.


"The rubble made the roof collapse ... and [it] went crashing from the eighteenth-floor all the way down to the fifth or sixth floor, trapping some of those 30 workers inside."

Army personnel, police officers and firefighters were working to rescue the labourers trapped inside.
More than 200 workers were believed to be at the building when it collapsed.