Heavy black smoke billowed across Dubai Marina on Friday morning from a fire caused by a cigarette tossed in a plant pot. On the ground, the fire was swiftly put under control, a Dubai Civil Defence official said. Social media users tweeted a picture of the fire showing heavy black smoke. Brig Rashid Khalifa Buflasa, the director general for fire and rescue at Dubai Civil Defence, said the blaze was started by a cigarette tossed into a plant pot near Al Habtoor Hotel. The fire was described by firefighters as very minor, Brig Buflasa said. He said the fire was controlled instantly and no injuries were reported.