New Delhi: In connection with the alleged bribery case referred to the CBI by the Defence Ministry, the probing agency on Tuesday received an audio tape carrying a conversation purportedly between Army chief General V K Singh and another person.

READ MORE: Antony confirms VK Singh’s claims

Sources in the agency refused to reveal how these tapes claimed to be of the meeting, in which the alleged bribery offer was made, reached them but said their veracity and authenticity were yet to be established.

The tapes carry a conversation purportedly between Singh and another officer in which the former is said to be shouting. However, they said the voices in the tapes are not authenticated so nothing can be said about their veracity.

Meanwhile, the agency has asked the Defence Ministry to make available a complaint from Singh besides other details such as list of witnesses and supporting documents after which it would initiate its probe in the case, they said.

The sources said the agency has not registered a formal inquiry in the case so far and any action would be initiated after it receives a complaint from Singh.

They said they have received a "reference" from the Defence Ministry to probe the matter and it has been processed as per the laid down procedure.

A preliminary enquiry or an FIR could be registered soon after completion of the procedural requirements.

The Army Chief had claimed in media interviews that an equipment lobbyist had offered him a bribe of Rs 14 crore, a matter which he had reported to Defence Minister AK Antony.

The Ministry had then recommended a CBI probe into the allegation made by the Army chief.