Updated at 4.56pm: Seven male teenagers, arrested in connection with the death of a 22-year-old man earlier this week, on Thursday appeared in the Eastern Court. The seven, aged 14 to 19, were jointly charged with one count of murder. They did not enter pleas and have been remanded in Lai Chi Kok Reception Centre. The court adjourned the case until November 3. The prosecution said police needed the time to catch other suspects who were on the run. The seven were arrested on Monday ? less than 12 hours after the body of 22-year-old Wong Siu-ngai was discovered on a lawn over the Chai Wan North Service Reservoir about 6.30am on that day. Police have said the suspects were acquaintances of the victim ? but not close friends. Investigators believed Wong was beaten to death following a trivial argument at a Mid-Autumn Festival barbecue on the grass pitch. A post-mortem examination conducted earlier this week revealed that Wong had died from a brain haemorrhage. The case came to light when about 6.30am on Monday, police received a report that a man was lying unconscious on the lawn. Wong, who had been a delivery worker, was found lying in the centre of the pitch about 100 metres from a makeshift barbecue. Discarded items such as barbecue forks, paper dishes and newspapers were found around the stove. The 22-year-old victim had gone to the barbecue with a group of young people ? mostly students, late on Sunday. Investigations indicated the assault took place shortly after midnight when the victim got into an argument with his friends, a police investigator explained. Wong had been discovered unconscious in the middle of the grassland by an elderly man who was walking through the park shortly before 6.30am for morning exercise. Wong was later certified dead at the scene by ambulancemen.