The CBI on Friday virtually gave a clean chit to Tata and Videocon groups in the 2G spectrum scam but said the role of Anil Ambani was being probed as three jailed corporate honchos of his company RADAG have distanced themselves from any wrongdoing.

The agency said it was conducting further investigation to find out the real beneficiaries as the arrested executives of the RADAG group have "resiled" from the statements given by them during the probe of the scam.

CBI, which refuted the allegation of not probing the role of corporate czars, said the three RADAG executives--Gautam Doshi, Surendra Pipara and Hari Nair--in their statements under section 161 of Code of Criminal Procedure had taken entire responsibility for the decision but in the Delhi high court they retracted.

"They took responsibility in entirety for the decision but in the high court (during bail plea) they said they were merely employees and did not receive any benefit," senior advocate K K Venugopal, appearing for the CBI, submitted before a bench of Justices G S Singhvi and A K Ganguly.

Giving detailed account of its probe into various allegations against Ambani, Tata Group, Videocon owned Datum and Attorney General G E Vahanvati in the 2G scam, the agency said that investigation was still on against Anil Ambani but it has not found evidence regarding the culpability of others in the scam.

Giving a detailed account of its probe into various allegations against Ambani, Tata Group, Videocon-owned Datum and Attorney General G E Vahanvati in 2G scam, the agency said the investigation was still on against Anil Ambani but it has not found evidence regarding the culpability of others in the scam.

"The role of Ambani and other employees in relation to 9.9 per cent share in the Swan Telecom which was sold to Delphi is being probed," Venugopal said while giving details of the transaction that took place among Swan, Delphi and Etisalat DB.

"Reliance ADAG had 9.99 percent shares in Swan. Swan had sold its 107.90 lakh shares to Delphi at the rate of Rs 15 per share and Etisalat had bought the shares from Delphi at the rate of Rs 285 per share.

"Shares given to Delphi was grossly undervalued and Reliance had received USD four million," he said while reading out reports received from Mauritius.

"The three employees of the RADAG have gone back on their earlier statements and have said in the Delhi high court that they were just employees of the company.

"We are going to take our probe further to find out who are the real beneficiaries of the transaction," he said.

The senior advocate said though the CBI stand was that the three employees were the real beneficiaries but after they retracted from their statements now it has to be found how the share transaction was linked to Delphi Investment Ltd and in such a circumstance there was likelihood of making the trio "approvers" in the case.

"They may turn approver in which event we will get the whole impression about Delphi and transactions (from Swan to Delphi," he said.