Lord Coe vents anger over Russia's Olympic cheating that 'tainted' London 2012

Lord Sebastian Coe says he is angry that doping by Russia's 2012 Olympic team has tainted the Games that he helped organise.

The comments by the chairman of the London 2012 Organising Committee came days after an independent report showed that Russia "corrupted" the Games to an unparalleled extent.

The report said there was a "unprecedented" national conspiracy in Russia to help 1,000 athletes, among whom were five medallists and 78 Games competitors.

The double Olympic 1500m champion told Sky News: "I was angry because every athlete that was in that stadium had devoted half of their young lives to that moment.

"To have that dream, that ambition, that decade of hard work, the commitment of family and friends and massive financial sacrifice ripped asunder in such a shoddy way made me feel angry."

So far, a retesting programme has revealed there were 61 proven Russian drug cheats competing in London. Coe said that the test results, rather than the testing system itself, had been "infiltrated", and added: "It makes me angry and it is depressing to see that when everybody worked so hard to make the Games what they were."

The IAAF, which Coe heads, was the only world governing sporting body to ban Russian competitors for the Rio Olympics. He said no decision had been made on whether they would be readmitted for the world athletics championships in London in 2017.

"They will only come back in if we are absolutely satisfied that the systems they come from are safe and secure and give confidence to clean athletes."

"They will only come back in if we are absolutely satisfied that the systems they come from are safe and secure and give confidence to clean athletes," Sky reported.

In November, Russia's parliament passed a bill to ensure coaches who encourage athletes to dope face tougher punishments.