The incident at Oxijen factory reportedly occurred as a result of human error and is the latest of a string of explosions to have hit the Tehran area and a key nuclear site in the past two weeks.
At least 4 people have been killed and more than 90 others injured as ambulances, air ambulances and medical teams continue rescue work at the blast site.
Factory fires are common in Bangladesh, especially in the dry winter season.
Police and child welfare officials rescued 27 child workers from the India's most popular biscuit factory, Parle Products Private Limited, following a tip-off.
“We really want to have a minimal impact on the environment by using as little electricity as possible,” Dana Mroueh, the owner of Mon Choco’s factory says.
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