The International Olympic Committee (IOC) on Friday announced 45 more athletes have failed dope tests from the 2008 and 2012 Olympic Games.
The results were part of a second wave of re-testing by the IOC as they continue their ongoing battle with doping.
Of the 45 failed tests, 30 were from Beijing 2008 and included 23 medallists.
Fifteen were from London 2012, although the IOC have yet to confirm if any were amongst the medal winners.
This second wave of re-tests has taken the total number of athletes who tested positive for prohibited substances to 98.
The third and fourth waves of tests are expected to continue during and following the Rio Games which start on August 5.
All athletes found to have broken anti-doping rules will not be allowed to compete in Rio.