A pregnant woman rushes with her husband to a hospital, bleeding and fearing she is about to miscarry her baby. Her passport shows the woman, a visitor from the mainland, to be an overstayer. Staff call police. After three hours - and a stand-off over the hospital bill - she is treated, then, the following morning, taken to a police station, handcuffed and thrown into a cell overnight. By the time the Immigration Department discovers it put the wrong date in her passport, she has been moved to an immigration detention centre for removal to the mainland. Yesterday, as the woman, a Mrs Ng, tearfully recounted her ordeal, a departmental spokesman said: 'We have already apologised to Mrs Ng for causing the inconvenience.' The woman, then three months pregnant, came to Hong Kong from Guangzhou last month to meet her husband using a two-way permit which entitled her to a three-month stay. The immigration officer who checked her passport wrongly wrote in it that she could stay only 23 days, but Mrs Ng did not spot the error. At about 1am on Saturday, the 24-year-old discovered she was bleeding and went to Kwong Wah Hospital in Yau Ma Tei for treatment. She had to wait for two hours to be seen. With police by now at the hospital, she finally saw a doctor at 4am, who told her she needed to stay overnight for observation. But because she and her husband, 21, could not afford HK$3,000 for treatment, the hospital refused to let her stay. When police said she would be arrested if she was not admitted, the hospital allowed her to stay overnight on condition the couple sought financial aid. Police officers stayed either side of her hospital bed. Though the couple tried to explain and suggested the police investigate whether the date in her passport was wrong, she was taken away for questioning, then cuffed and moved to a police detention centre in Hung Hom. 'I felt I was treated like a criminal in prison,' Mrs Ng said. Her husband sought the help of the Democratic Alliance for the Betterment and Progress of Hong Kong. Only now did police check they had been right to detain her. The Immigration Department then admitted its error and gave Mr Ng a letter in English, which he cannot read, admitting 'the endorsement ... was suspected to be wrongly endorsed'. He wants HK$5,000 compensation and an apology. 'The baby is fine now, but who could be responsible if something happened?' he said. At a DAB news conference with the couple, lawmaker Gary Chan Hak-kan said officials had made a string of mistakes. Police said they had followed established procedures.