BUCHAREST: Three bosses of a nightclub in Romania, where a weekend blaze left 31 people dead and nearly 200 injured were arrested Monday on suspicion of manslaughter, prosecutors said Monday. The three men aged between 28 and 36 were questioned for several hours in connection with the fire late Friday in the club in the capital Bucharest. Witnesses said a fireworks display triggered the blaze at the Colectiv nightclub in a former shoe factory, which sparked a stampede as terrified revelers scrambled to get out. Most of the victims were killed on the spot. Nearly 200 people were injured. The disco did not have the required authorization to hold concerts or to stage pyrotechnic displays, the secretary of state at the interior ministry, Raed Arafat, has said. One of the three suspects taken into custody Monday is a former barman with shares in several clubs. Two of the other clubs in which he has a stake were also destroyed by fires in recent years, Evenimentul Zilei daily reported.