IAAF ethics boards opts to not formally investigate bribery claims surrounding Qatar's bid for 2017 World Championships
The ethics board of the athletics' world governing body the IAAF will not be pursuing allegations of bribery made by UK Athletics chairman Ed Warner in relation to Qatar's bid to host the 2017 World Championships.
London won the right to put on the event in November 2011, but Warner claimed during a Radio Five Live interview in January he had been tipped off that IAAF Council members were being offered envelopes stuffed with cash by the Doha delegation.
Warner later revealed his alleged source to be Sebastian Coe, the current IAAF president, and offered the organisation names of three potential witnesses to the exchange
The ethics board launched a preliminary investigation but, having contacted Coe, the three named individuals and the full IAAF council, did not receive sufficient support for Warner's original claims.
A statement released by the ethics board read: "The ethics board has now collated the responses to those enquiries, which were substantial in number. To date, none of the respondents have had any relevant evidence corroborative of Mr Warner's recollection or relevant to the alleged factual matters the subject of the purported rumour.
"As a result of its preliminary investigations, and noting that there is no documentary evidence to corroborate Mr Warner's recollection, the ethics board does not consider that it has sufficient evidence at present to open, under its procedural rules, a formal investigation.
"In response to enquiries made of him by the board, Coe has stated that he has no recollection of hearing such a rumour or therefore of communicating it to Mr Warner."
The IAAF have vowed to monitor the matter for new developments.
UK Athletics has declined to comment officially on the findings, but is understood to consider the matter closed for the time being.