New York-based Human Rights Watch (HRW) has released a report accusing Cambodian authorities of locking up and torturing thousands of people in drug detention centres. The human rights group says many of the detainees are children and that they suffer abuses such as rape and electric shocks. <br/><br/>HRW has also accused UNICEF of involvement in one of the detention centres, saying one of the organisation's vehicles has been used to transport children to the drug treatment centre. <br/><br/>According to HRW, there are 11 drug detention centres scattered across Cambodia and more than 2,000 people are detained inside each year.