[FONT=Verdana]A 22-story building under demolition unexpectedly collapsed in Bangladesh's capital, killing three people and injuring dozens of others, a rescue official said Sunday.[/FONT]

[FONT=Verdana]Some of the building's floors suddenly caved in late Saturday, raining large chunks of concrete and glass shards down on workers who were demolishing the structure, said Selim Newaz Bhuiyan, a fire brigade official.[/FONT]

[FONT=Verdana]Several workers were hit by debris, while others were hurt trying to jump to safety out of lower floors.[/FONT]

[FONT=Verdana]Rescuers pulled out at least 20 injured workers from the rubble and recovered three bodies. Authorities were investigating the cause of the collapse.[/FONT]

[FONT=Verdana]Witnesses said the building's 14th floor suddenly crashed onto the floor below as workers cut through concrete. Several other floors then collapsed atop each other.[/FONT]

[FONT=Verdana]Injuries and deaths at construction sites are common in Bangladesh, as many builders fail to provide safety equipment and scaffolding consists of bamboo and rope.[/FONT]

[FONT=Verdana]Another worker was killed at the demolition site a few months ago after falling from a top floor, Bhuiyan said.[/FONT]