Two persons have been killed and 17 wounded in a shooting at a Florida nightclub, reports from the US say. The incident took place at Club Blu in the early hours of Monday, according to the police. The shooting is believed to have taken place during a ‘teen night’; some of people at the event were as young as 13, reports suggest. Witnesses reported over 30 gunshots at the scene. This is the second mass shooting in Florida in a week. In June, a gunman killed 49 people at a gay nightclub in Orlando in the worst mass shooting in modern US history. The attacker called 911 in the middle of that massacre and pledged allegiance to ISIS.