A Sun Yee On triad society member yesterday told a jury how a karaoke room quarrel escalated into a firebombing that left 17 people dead. The witness, who cannot be named for his own protection, went to the Top One Karaoke club in Tsim Sha Tsui with friends on January 20 last year. He fell asleep in one of the rooms and awoke to find an argument had broken out among his friends, the Court of First Instance heard. In apparent response to the commotion, two men claiming to be bouncers entered the room. The witness told the court one of them was a Wo Shing Wo triad member and he summoned five or six more 'bouncers' into the room. 'We were told not to quarrel,' he said. But a fight erupted after one of the witness' group said he followed the Sun Yee On, the court heard. Four of the customers went to hospital with head injuries. A group of men drove back to the Prat Avenue bar the next day planning to beat up the offending staff members, prosecutor Barry Moorfoot said earlier. The gang members tried twice in three days to exact revenge but were foiled by a heavy police presence. It is alleged they then met at the Night Bird karaoke bar in Tsim Sha Tsui and decided to firebomb the Top One Karaoke club. Market worker Lee Ka-ho, 22, driver Tung Shing-fei, 27, and Cheng Wai-shing, 25, and Lau Ying-tat, 29, both unemployed, denied murdering 17 people. The trial continues before Mr Justice Thomas Gall.