CAT/C/NOR/CO/6-7 regard to unhealthy sanitary conditions and overcrowding. Furthermore, the Committee notes with concern the increased numbers of detainees at Trandum, as well as the few cases of excessively long duration of detention (arts. 10, 11 and 16). The State party should ensure that persons are held at Trandum only according to the law and only for the duration prescribed by law. The State party should ensure that all detention conditions are in total conformity with international standards, including the United Nations Standard Minimum Rules for the Treatment of Prisoners, in particular with regard to the sanitary conditions and overcrowding. Training on the prohibition against torture and ill-treatment 18. While noting that different training programmes for law enforcement personnel on the provisions of the Convention, including the prohibition of torture, are systematically held, the Committee regrets that there is no available information on the impact of trainings on reducing incidents of excessive use of force and ill-treatment. The Committee regrets that the training is too theoretical, providing little knowledge of the practical use of human rights provisions. The Committee is also concerned about the lack of systematic training of health personnel on the Manual on Effective Investigation and Documentation of Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment (the Istanbul Protocol) (art. 10). The State party should ensure that educational programmes and practical training for law enforcement personnel on the provisions of the Convention, including on the limitations on the use of force and on the principles of non-discrimination, proportionality and last resort to force, are regularly provided. Furthermore, the State party should develop and implement a methodology to assess the effectiveness and impact of relevant training programmes on the incidence of cases of torture, excessive use of force and ill-treatment. In addition, the State party should provide systematic, thorough and practical training in the application of the Istanbul Protocol to all relevant health personnel. Use of restraints and arrest techniques 19. In light of the case concerning Mr. Eugene Obiora, who died in 2006 after police officers arrested him, the Committee notes the criticisms of the Parliamentary Ombudsman on the State party’s insufficient compliance with its obligations in respect of the use of restraints exercised on a person, and on the lack of appropriate knowledge concerning arrest techniques and the absence of continued training (arts. 2, 10, 11 and 16). The State party should take immediate steps to improve and update the arrest techniques, in order to avoid such cases as the death of Mr. Obiora, and should improve its training programmes in order to keep the law enforcement officers updated on the appropriate arrest techniques. Prompt, effective and impartial investigations 20. The Committee notes that the State party has taken measures to further improve the handling of complaints against the police concerning acts of ill-treatment and the investigation of relevant allegations. Nevertheless, the Committee remains concerned about allegations concerning violations of the Convention committed by law enforcement officials, including allegations relating to discriminatory excessive use of violence, and about the lack of impartiality of subsequent investigations (arts. 12 and 13). The State party should closely monitor the effectiveness of the new procedures for the investigation of alleged violations of the Convention committed by law enforcement officials, in particular those in which discriminatory treatment based on ethnicity is 6