Twelve people, including nine children, were injured when a school van rammed a minibus in Choi Hung yesterday. The crash happened in Clear Water Bay Road, outside Ping Shek Estate, at about 7.15am when the van, driven by a 43-year-old woman, was taking 24 primary pupils to two schools in Ngau Tau Kok. After the green minibus, with 10 passengers on board, stopped because of a traffic jam, the school van slammed into its rear. One boy said: 'A student was thrown from his seat ... Another pupil was bleeding from his head and others screamed and cried. It was chaotic.' Eight students - six boys and two girls - aged seven to 11 were injured but their driver was unhurt. The minibus driver, 53, and two passengers - a man, 42, and woman, 47 - were also injured. All of them were treated at United Christian Hospital. Later, another boy went to Tseung Kwan O Hospital to seek treatment. A government spokeswoman said they had been discharged. A police spokeswoman said the two drivers passed a breathalyser test with zero alcohol reading and officers were still investigating. A Kowloon East traffic unit investigator said the van driver was probably tailgating. No one was arrested. Meanwhile, police are appealing for information about a traffic accident where an 88-year-old woman died after being hit by a light goods vehicle in Sheung Shui on Tuesday. The woman was knocked down by the vehicle while crossing On Kui Street outside On Hing Industrial Centre shortly before 8.30am. She was taken to North District Hospital where she was certified dead at 9.50pm on the same day. Anyone who might have witnessed the accident is urged to contact police on 2675 3325 or 2455 4210.