The International Olympic Committee says a further 23 athletes have been found to have been doping in their performances at the Olympic Games in London.
Olympic rings Photo: PHOTOSPORT
Re-analysis of the "A" samples from the athletes in five sports and from six countries picked up the doping.
In total, 265 selected doping samples from the Olympic Games London 2012 were re-analysed based on intelligence-gathering that began in August 2015.
Further re-testing from those games is continuing with the possibility of more results in the coming weeks.
Last week, the IOC announced up to 31 athletes could be banned from competing at the Olympic Games Rio 2016 after the reanalysis of 454 samples from the 2008 Olympic Games in Beijing.
Since then, one further sample from Beijing 2008 with unusual results had also been found.
IOC President Thomas Bach said he had already appointed a disciplinary commission, which had full decision-making power.
The IOC was in the process of informing the athletes.
