The second part of an Independent Commission report into allegations of systematic doping at the highest levels of international athletics is being published by the World Anti-Doping Agency.
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Senior staff at athletics' governing body must have known about doping taking place within the sport, an independent report has found.
A report is expected to reveal there is no way members of world athletics' governing body could have been unaware of the extent of doping.
Sebastian Coe has said he wished he did more to stamp out doping while a vice-president of athletics' governing body.