The CBI today conducted raids at the premises of former Telecom Minister Dayanidhi Maran after registering a case against him in connection with the controversial Aircel-Maxis deal.

The agency has also booked his brother Kalanidhi Maran, Maxis owner T Ananda Krishnan, senior executive Ralph Marshall and three companies in the case on charges of criminal conspiracy under IPC and Prevention of Corruption Act.

CBI spokesperson said in New Delhi that the investigation agency carried out searches at the premises of Maran brothers in Chennai and Delhi after registering the case.

It has been alleged by former Aircel Chief C Sivasankaran that Maran as the then Telecom Minister reportedly favoured Maxis-group in the takeover of his company and in return investments were made by the company through Astro network in Sun TV owned by Maran family.

The CBI, in its recent status report to the Supreme Court, had said that during Maran's tenure there was deliberate delay to provide letter of intent to Sivasankaran.