India's 'most wanted man' was being held by Hong Kong immigration officials at Kai Tak airport last night, as it emerged his Indian passport had been revoked. Officials would not reveal the grounds for holding businessman Amir Bhai, 49. He was seized as he left Eastern Court on Thursday after extradition proceedings against him were dropped. The detention may be due to his passport being cancelled. An official said it was normal in such cases for the Government to attempt repatriation. 'We would talk to the person to discuss how they could return home. If the person wants to go somewhere else, it depends on whether they have valid documents to go there,' the official said. But his solicitor, Lee Burney, is concerned officials may be trying to 'use the backdoor' to send him back to India. Bhai was arrested in a swoop by Interpol officers when he flew into the territory from Dubai in June. Indian authorities wanted him extradited in connection with a 680 million rupee (HK$148 million) bribes scandal that has toppled several of India's top politicians. But the extradition order failed when the Attorney-General's office dropped the case on Thursday. India's media has been critical of the country's Central Bureau of Investigation, claiming its help and co-operation with Hong Kong authorities had been insufficient. CBI director Joginder Singh arrived in Hong Kong yesterday to meet officials. But a source at the Indian Commission said: 'He is here to discuss areas of co-operation with his Hong Kong counterparts. He is the top officer, not an inspector who has turned up in handcuffs.'