The parents of youngsters who attacked and robbed a teenage couple were lambasted yesterday by a judge who said they were partly to blame for their children's crime. Deputy District Court Judge Ada Yim Shun-yee sentenced the five, aged 16 to 20, to a training centre which she said would teach them the social values and self control they had not learned at home. Ng Wai-man, Leung Ka-wing, Lo Tat-hing, Nip Hon-man and his brother Nip Hon-mo had pleaded guilty earlier to one charge of robbery and one of theft. The court heard they attacked a 15-year-old girl and her 14-year-old boyfriend and robbed them of HK$23,148 in Cornwall Street Park, Sham Shui Po, on March 17. They hit the boy in the stomach and left eye, leaving him with astigmatism from a permanently scarred cornea. They fled in a taxi but were caught after they openly discussed their actions and the driver called police. On arrest, two defendants further admitted that they had stolen a mobile phone from an internet friend in February. The court heard in mitigation that all five had grown up in broken families, some being left under supervision and others being ping-ponged between their parents. 'You brought them to this world but you didn't guide them, but instead pushed them around,' the judge told the parents. 'In time, this is what they have became ... and to a very large extent it was your responsibility,' she said. The parents could have sought institutional help 'if they wanted to' before their children went off the rails but ignored the problem. The defendants' release will depend on their progress at the centre.