A fire in a bar in the Russian city of Kostroma has killed at least 15 people.<br />'' <br />'' Authorities have said that it might have begun when a drunk customer at the nightclub fired a flare gun on the dance floor, reported Russian media.<br />'' <br />'' The fire reportedly spread when parts of the lighting rig on the ceiling ignited, quickly filling the room with smoke. It took several hours for it to be extinguished.<br />'' <br />'' A suspect said to be a local resident, has been arrested. It took emergency workers several hours to put out the fire, which began at around 02:00 local time in Kostroma, 300 km northeast of Moscow.<br />'' <br />'' The exact number of people inside the club at the time is not known, but 250 people were able to evacuate. According to BBC Russian, the company which manages the club is owned by a local politician.<br />'' <br />''In 2009, 159 people died in a nightclub in the Russian city of Perm.