© BBC
Last month, the International Olympic Committee called on the BBC to back up claims made on BBC Two's Newsnight programme of secret payments made by Azerbaijan to World Series Boxing (WSB) for the guarantee of two gold medals at the Games next year.
The AIBA denied the allegations "in the strongest possible terms", but launched an investigation of the claims. The BBC has agreed to co-operate with the probe, but it will refuse to reveal the identities of any confidential sources, reports PA Sport.
After launching its investigation at a meeting in Lausanne yesterday, the AIBA said in a statement that the corporation has so far provided no documentary evidence to support its allegations.
"The committee has started the process of gathering in all documentation and interviewing the parties that are relevant to the investigation," said the AIBA.
"The chairman of the committee wrote to the BBC on September 30, 2011 requesting that the BBC provide the committee with all evidence relied upon by the BBC in support of the allegations made in the Newsnight programme.
"The BBC has informed the committee that, although they are willing to assist with the investigation, they will not identify any confidential sources. The BBC has yet to provide the committee with any documentation or evidence.
"The committee will not be making additional statements regarding its investigation until the investigation has concluded."
A BBC spokesperson confirmed that evidence would be passed on, adding: "We are in contact with the authorities and will be supplying material."
Newsnight claimed that an Azeri national paid $9m (£5.8m) to a WSB competition, understood to be on the assurance of two golds at London 2012.
However, the AIBA denied the allegations and said that the money was actually a loan by "an Azerbaijani investor" that was "made on a commercial basis and with a view to a commercial return".
