New Delhi: The Central Bureau of Investigation (CBI) on Thursday booked Syndicate Bank MD and CEO Melwyn Rego, who was Deputy Managing Director of IDBI, along with several others in the Rs 600 crore IDBI loan default case. The CBI has also booked Former IDBI CMD Kishor Kharat, at present MD and CEO of Indian Bank, in the loan fraud case.Earlier on Thursday, the CBI registered a case against former Aircel promoter C Sivasankaran’s companies, Axcel Sunshine Ltd and Finland-based Win Wind Oy for allegedly defaulting on loans worth Rs 600 crore taken from IDBI bank, officials said.Sivasankaran, who had levelled allegations against former Telecom Minister Dayanidhi Maran of pressuring him to sell his stakes in Aircel to Maxis, is a citizen of Seychelles. He is also an accused in this case as chairman of Siva group of companies, an official told The Hindu.Among the other accused top bank officials are M.S. Raghavan, then CMD of IDBI Bank and former Deputy Managing Director B.K. Batra, as reported by The Hindu.The searches at 50 locations include the residences of former senior IDBI bank officials and are spread across Delhi, Faridabad, Mumbai, Gandhinagar, Chennai, Bangalore, Belgaum, Hyderabad, Jaipur and Pune, the officials said.Sivasankaran’s firms had allegedly taken a loan of Rs 530 crore in February 2014. The amount increased to Rs 600 crore after becoming a non-performing asset, they said.The case was registered under sections relating to criminal conspiracy, cheating and corruption against British Virgin Islands-based Axcel Sunshine Limited on allegations of perpetrating fraud through the loan accounts of Win Wind Oy, Finland and Axcel Sunshine Limited, the officials said. They said 15 senior officers of IDBI bank, including retired officials, and 24 private officials, including directors and chairmen, and their companies have been booked.The FIR, according to The Hindu, alleges the role of Axcel Sunshine Limited, British Virgin Islands-based Broadcourt Investments and Lotus Ventures Investment; Indian Telecom Holdings Limited (Mauritius); Siva Palm Corp (Singapore); and Chennai-based Siva Industries and Holdings Limited and Sterling Agro Product and Processing Private Limited.(Inputs from PTI)