An unspecified number of workers were also believed trapped inside the building, which was being demolished when it collapsed on Saturday night, they said.
DHAKA (Reuters) - At least four workers were killed and about 50 others were injured when the roof of a 22-storey building collapsed in the Bangladeshi capital Dhaka, police and witnesses said on Sunday.
An unspecified number of workers were also believed trapped inside the building, which was being demolished when it collapsed on Saturday night, they said.
"It came down with a roaring sound," said one survivor.
Army personnel, along with police and firefighters, were working to rescue the laborers trapped inside.
!ADVERTISEMENT!"Rescuers arrived shortly after the accident but it was difficult to get in," said a fire brigade officer.
Authorities had ordered the demolition of the building in the centre of Dhaka because its construction violated rules, officials said. Hundreds of workers have been working to tear down the building for months.
Many felt the building, one of the tallest in the Bangladesh capital and known as the Rangs Building, could probably have been demolished by using dynamite or other explosives.
But the city development authorities wanted it to be demolished manually, apparently to provide temporary jobs to the city's large unemployed work force.
(Reporting by Serajul Islam Quadir; Writing by Anis Ahmed; Editing by Alex Richardson)
