In Bangladesh, at least 20 people have been killed and 70 others injured in a huge fire that broke out at a packaging factory in Tongi, north of the capital Dhaka. <br/><br/>Police said about 100 people were in the four-storey building at the time, including machine operators and guards. <br/>The blast was caused by an explosion in the boiler room, at the start of the working day. <br/><br/>Firefighters are struggling to bring the blaze under control. <br/><br/>Local fire and civil defence official said 20 fire trucks deployed to extinguish the fire.