The ship carrying the Bangladeshis will bring back Myanmar security personnel who crossed the border recently amid fighting with rebels
Fire service control room duty officer Farhad Uzzaman said Meghna Cycle Factory at Tejgaon industrial zone went up in flames on Wednesday noon.
Eight fire service units brought the fire under control within an hour.
"Preliminary it is thought that some electric disturbance is behind the fire. But the real reason will be revealed after the investigation."
No one was injured in the incident.
The damages could not be figured out immediately, said Farhad Uzzaman.