Describing the incident as an "eye-opener", the CBI chief told the JPC that even the agency was surprised over the alleged development although it has counter-intelligence mechanism in place which could not detect it.
"The CBI director clarified that AK Singh is one of the prosecutors (in the 2G case) assisting chief prosecutor U U Lalit appointed by the Supreme Court...He (Sinha) said Singh was only one of the prosecutors, therefore, the investigation into the case has not been polluted (by the alleged collusion)," JPC chairman PC Chacko told reporters after the meeting.
The taped conversation purportedly between Singh and Chandra related to legal strategy of the case.
Sinha said after the purported expose, Singh has been removed from the case and a new prosecutor has been appointed in his place.
Noting that both Singh and Chandra have denied the conversation, the CBI chief said any punitive action can take place only after forensic test and further inquiry.