Athletics’ world body has decided not to investigate bribery claims against Qatar after a preliminary probe failed to find anything more than “rumours” surrounding bidding for the 2017 world championships.

The IAAF was acting on testimony from UK Athletics chief Ed Warner that the world body’s then vice-president, and now president Sebastian Coe had told him Qatari delegates were handing out cash-stuffed “brown envelopes” before members cast their votes in 2011.

But the body’s ethics board said Coe, when questioned, couldn’t remember hearing the rumour or making the comment, and that nobody present had corroborated Warner’s claim.