Flames shot out of a building in the Ras al Khor Industrial Area around 5:45 a.m. (0145 GMT) on Tuesday.
Police and civil defense forces battled the blaze and brought it under control in about an hour as the sun rose over Dubai's skyscraper-studded skyline.
Police at the scene stopped onlookers from shooting video of the fire and made them delete images off their mobile phones.
Officers said there may have been people inside the building at the time of the fire.
Civil defense and police have yet to make an official statement on the fire.
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