HONGKONG has violated international laws and contradicted its own call for human rights by detaining Vietnamese boat people, according to a new report. The report by the Lawyers' Committee on Human Rights and the Women's Commission for Refugee Women and Children has been submitted to a United Nations working group investigating whether countries' laws condoning arbitrary detention breach the Universal Declaration of Human Rights. The report also claims the Hongkong Government has ignored the extent of violence and human rights abuses in the camps. It includes accounts from international lawyers, three families in detention and psychologists who have found that the emotional and intellectual development of children in camps has been harmed by repeated encounters with violence. It says women and children were traumatised by separation from families as a result of a need to use outside medical facilities. The report quoted a women who concealed her pregnancy for this reason. She went into labour in a camp and had her legs pushed tightly together until she had to go to a hospital. She said the baby was born but died from suffocation. Others claimed they were harassed and raped by camp residents and government officials, who also offered protection in exchange for sexual favours. The director of the refugee project of the lawyers' committee, Mr Alan Helton, said from Poland yesterday that the report had been submitted to the UN Working Group on Arbitrary Detention in Geneva this week. The group had indicated the report was likely to be submitted to Hongkong for a response within 90 days. Mr Helton said Hongkong risked international rebuke for its ''world-class violation of human rights when it claims to want a law respecting its own human rights in place before 1997''. Government officials said they would wait to receive the report before responding formally. But Government spokesman Mr Peter Randall said crime in the camps was probably lower than in towns with comparable populations. About 30,000 of Hongkong's boat people had been screened out and could volunteer to go home. Another 2,400 were refugees and about 10,500 were awaiting screening. The report said the Hongkong Immigration Ordinance might condone detention of Vietnamese arriving without a valid travel document, but it violated ''both treaty and customary international law prohibitions against prolonged arbitrary detention''. The report said Hongkong's use of boat people as ''hostages'' in a deterrence policy was legally defective because: A person cannot be legally detained for the illegitimate purpose of altering another's behaviour; and Indefinite prolonged detention is not permitted except in limited circumstances, which require ''individualised judicial determination that the individual will flee or be a danger to society''. Mr Helton called for a case-by-case ruling with special consideration for women and children and long-stayers with a good record. But Mr Randall said boat people would face difficulties because most did not speak English.