At least 10 Olympic medallists are reportedly among the Russian athletes who have tested positive for doping at the 2008 Beijing Games.Read the full story ›
Tennis star Maria Sharapova faces an anti-doping panel on Wednesday after testing positive for the banned drug meldonium in January.Read the full story ›
No British athletes will be implicated in the 31 who tested positive doping after the 2008 Beijing Olympics, ITV News understands.
ITV News Sports Editor Steve Scott, speaking from the IOC headquarters in Lausanne, said "the usual suspects" are likely to be involved - including Russia - and suggests the sports linked to the recent allegations include those already under the spotlight: "track and field, and weightlifting".
The results for the 250 test samples taken after the London 2012 Olympic Games are likely to be announced before June, he added.
The US Justice Department is investigating allegations of state-sponsored doping by "dozens" of top athletes in Russia, according to the New York Times.
Russia's Athletics Federation is currently suspended from all competitions - including the Olympic Games in Brazil, following a vote by the IAAF in November.
It led to the acting head of Russian Athletic Federation, Vadim Zelichenok, threatening to resign.
Thirty-one athletes have tested positive for doping following retesting of samples from the 2008 Beijing Olympics.Read the full story ›
Hundreds of people have signed a petition calling for doping in sports to be made a criminal offence.
The petition on change.org was started by the former Tory sports minister Lord Moynihan.
A competitor who deliberately cheats "shreds the dreams of clean athletes with every needle they inject", it says.
So far more than 300 people have signed the appeal, which will be delivered to the Prime Minister David Cameron and John Whittingdale, secretary of state for culture, media and sport.
Mark Bonar, the doctor at the centre of the Sunday Times doping allegations scandal, had his professional services dispensed with on Friday.
The Omniya Clinic said it had terminated its working relationship with Dr Bonar after it was revealed he does not have a licence to practise medicine in the UK.
Leicester, Arsenal and Chelsea have expressed their disappointment at the doping allegations they claim are "without foundation".Read the full story ›
The chief executive of the General Medical Council has welcomed a newspaper investigation into doping claims involving a British doctor.
"I would like to thank the Sunday Times for bringing these issues to our attention", Niall Dickson said.
These are serious allegations and we will follow them up as a matter of urgency. We expect all doctors to follow our guidance - if they fail to do so they are putting their right to practise in jeopardy.
Dr Bonar does not currently hold a licence and is therefore unable to practise medicine in the UK.
Any doctor without a licence who continues to carry out the privileged duties of a doctor is committing a serious breach of our guidance, and potentially a criminal offence.