The world governing body for athletics (IAAF) released a formal statement on Tuesday, strongly denying media reports of widespread doping in the sport.
Russian Sports Minister Vitaly Mutko said on Thursday his country's doping scandal was payback from those unhappy Russia had won the rights to host the 2018 FIFA World Cup.
The World Anti-Doping Agency (WADA) is considering a blanket ban on countries whose athletes regularly dope in the wake of a series of damaging blows for the sport in recent days, according to its president Craig Reedie.
"The IAAF's delaying publication for so long without good reason is a serious encroachment on the freedom of publication," the researchers said in a statement.
World athletics' governing body has suppressed a 2011 survey that reveals that up to a third of the world's top competitors admitted using banned performance-enhancing techniques, Britain's Sunday Times and German broadcaster ARD/WDR reported.
Kenya's top runners have urged athletics fans and sports enthusiasts across the world to keep faith in them, despite media allegations of widespread doping in the east African nation famed for its top-class runners.
The world governing body for athletics (IAAF) fought back on Tuesday against media reports of suspected widespread doping in the sport, rejecting accusations it failed to investigate dubious drugs test results properly.
Martin Winterkorn, the former boss of Volkswagen who quit last month, will step down from his remaining posts related to the company.
Calls grow for global athletics probe after widespread doping allegations.
"The future of athleticism depends on the athletes," Lewis told Reuters ahead of the inauguration of the NACAC athletics championships in Costa Rica. "At the end of the day, the sport is going to be as good as the athletes want.
The German police had received information about plans to carry out a bomb attack on a gurdwara in Essen by a group of teenagers from one of the suspects' mother some weeks before an explosive was detonated there, media reports have claimed.
Victor Conte, the man at the centre of what was the United States's biggest doping scandal, believes the latest drug scandal to rock the sports world is all part of a cover up to protect the bottom line.
The BBC report said a third of medals in endurance events at the Olympics and world championships between 2001 and 2012 were won by athletes who have recorded "suspicious tests".
Some of the readings from athletes' blood tests leaked by a whistleblower for a report exposing suspected doping were so extreme they were 'downright dangerous', one of the experts cited in the report.