The fire started around 1:45pm, the Fire Service said
After demonstrating inside the factory from Sunday morning, the Dragon Sweater workers took to the Malibagh-Rampura street around 1:30pm, bringing traffic in the area to a complete halt.
They said the owners have not paid them for four months.
Abdur Rashid, the chief of Hatirjheel Police, told bdnews24.com that the workers left the street around 3:30pm after police mediated talks between the protesters and the factory authorities.