CBI sources said today that Radhakrishnan, who was also the chairman of Antrix, was examined for nearly two hours at Antrix's office in Bengaluru.
The move came at a time when Antrix has been slapped a fine of about Rs 4,400 crore (672 million dollars) by International Arbitration Court for unilaterally terminating the contract with Devas which was planning to use the spectrum to launch satellite-based multimedia services on hand-held devices.
The agency has slapped cases under 120-B (criminal conspiracy), 420 (cheating) of Indian Penal Code and relevant sections of Prevention of Corruption Act against them.
The Antrix-Devas deal had seen early exit of G Madhavan Nair as Chairman of ISRO as he was the Chairman of the Governing Council of Antrix when the deal was finalised.
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The CBI alleged that Devas had submitted false, wrong and incorrect information claiming that it had the technology and was fully capable of delivering the S-DMB services to get the rights of delivering same in India through PS1 and PS2 and consequently, Devas allegedly got "wrongful gain of more than Rs 578 crores (approx) from various investors from USA, Mauritius, Singapore etc."
Devas has taken Antrix and the Government to International Court after its contract was cancelled by the Cabinet Committee on Security in 2011.