Timeline of a scandal: how athletics was rocked by corruption claims

Athletics in crisis: explaining the damning doping report

3 December 2014

German documentary by ARD accuses Russia of funding a comprehensive “East German-style” doping programme for athletes that has been covered up at national and international levels

10 December

Guardian exclusive, questions for son of Lamine Diack, the president of the world governing body of athletics. Papa Massata Diack appeared to request a payment of $5m in the course of Doha’s failed bid to win the right to host the 2017 world championships, according to leaked emails

11 December

Papa Massata Diack steps down from IAAF. He joins Valentin Balakhnichev, president of the Russian athletics federation and the IAAF’s treasurer

Dr Gabriel Dollé, IAAF’s director of medical and anti-doping department, leaves his post after being interviewed by the world governing body of athletic’s ethics commission

16 December

Announced that former Wada president Dick Pound would investigate Russia claims with three-man independent panel

23 January 2015

The Russian athletics head coach, Valentin Maslakov, offers to resign after doping revelations

16 February

Diack says he is “shocked” and “disturbed” by the doping “crisis” within athletics

The former IAAF president, Lamine Diack, is under investigation by French police for allegedly receiving more than €1m to cover up doping. Photograph: Paul Gilham/Getty Images Europe

21 April

Diack says Russia will not be banned from future Games following allegations of systematic doping

2 August

Sunday Times and ARD reveal series of doping allegations after blood data leak from IAAF. Apparently a third of medals, including 55 golds, in endurance events at Olympics and world championships between 2001 and 2012 were won by athletes who recorded suspicious tests

7 August

Liliya Shobukhova stripped of London marathon title over doping

Wada announces it will investigate Sunday Times and ARD doping claims

9 August

Sunday Times alleges that seven London Marathon winners in 12 years are under doping suspicion

4 August

Sebastian Coe says allegations of doping and cover-ups were a “declaration of war”

19 August

Lord Coe elected as IAAF president

20 August

Diack insists 99% of athletes are clean

4 November

Diack under investigation by French police for allegedly taking bribes to cover up doping

9 November

Wada’s independent commission recommends Russia should be banned from athletics competition