EDIT CONTAINS 4:3 MATERIAL<br/> <br />As investigations continue into a string of fires at clothing factories in Bangladesh... video has emerged that may help authorities.<br/> <br />Closed circuit video from a clothes factory near the capital Dhaka shows a woman in a pink head scarf in the upper left part of the screen.<br/> <br />She disappears for a moment under a table of clothing, then walks away.<br/> <br />Minutes later, smoke begins billowing from under the pile of clothes.<br/> <br />Employees, including the same woman in the pink head scarf, run in and try to put out the spreading fire.<br/> <br />Later, she and another employee were taken into police custody for questioning.<br/> <br />Three other incidents since Saturday, including the country's most deadly factory fire in which more than 100 people died, have authorities investigating the possibility of arson.<br/> <br />Days of protests by factory workers have highlighted notoriously poor working conditions within Bangladesh's garment industry where workers earn as little as $37 a month.