THE BOMBAY High Court is likely to hear arguments on the bail application of Vipul Ambani, diamantaire Nirav Modi's aide - an accused in the alleged Rs 13,400-crore Punjab National Bank (PNB) fraud case - on Thursday. He has sought bail on the ground of being allegedly illegally detained by the CBI. Ambani has been booked on charges of criminal conspiracy and cheating under the IPC and under sections of the Prevention of Corruption Act-1988. On Tuesday, senior counsel Amit Desai told the vacation bench that Ambani was called by the CBI for investigation on February 18. When he appeared before the agency at 7.30 pm, he was not asked any questions and was made to sit, he added. After sometime, Ambani was allegedly asked to return the next day at 11 am. Accordingly, Ambani visited the CBI office the next day, but was not allowed to go home and was kept in the office through the night, Desai said. He added that after spending a whole day at the CBI office, Ambani was shown as arrested at 8.15 pm on February 20.