The Central Bureau of Investigation (CBI) is investigating its sacked prosecutor A K Singh for allegedly colluding with one of the accused firms in the 2G scam case.
Singh was removed after he was heard on audio tapes purportedly advising Unitech Managing Director Sanjay Chandra about the CBI´s legal strategy in the case, the agency had confirmed late Monday.
The CBI on Monday questioned both Singh and Chandra over the taped phoned conversation that was sent to it anonymously and is being forensically examined.
The CBI said it had received the audio recording in a compact disc on Feb 6 and contains a conversation purportedly between Singh and Chandra that took place in September last year.
A statement from Unitech said that Chandra "wishes to make it absolutely clear that he has never met the prosecutor in the 2G case outside of court or had any phone conversation with him."
"He denies the suggestion that his voice is on any alleged recording. It appears a fabricated voice recording has been sent anonymously to the CBI," the statement said.
Unitech, which operates in India in partnership with Norwegian firm Telenor under the Uninor brand, is one of the companies accused of receiving out-of-turn mobile licenses in 2008.
Shares of Unitech, with which Telenor is in the process of breaking ties, ended 18 pecent lower on Tuesday, after plunging more than 20 percent earlier in the day following media reports.
Lawyer-activist Prashant Bhushan, whose Public Interest Litigations have led to the Supreme Court monitoring the CBI´s investigation in the case, said that if the tapes are proved genuine, Chandra´s bail should be annulled.
In perhaps the biggest scam in Independent India, allegedly masterminded by former telecoms minister A Raja, spectrum was given away at throwaway prices in 2008 causing a potential revenue loss of up to Rs 1.76 lakh crore.
While Raja, a number of government and private sector officials and firms face trial, a landmark judgement by the Supreme Court last year had quashed 122 licenses issued under the sale.