Moscow lab protected doped Russian athletes at Sochi - WADA

Richard McLaren, who was appointed by the World Anti-Doping Agency (WADA) to head an independent investigative team, presents his report in Toronto, Ontario, Canada July 18, 2016. REUTERS/Peter Power

TORONTO (Reuters) - With the Rio Olympics less than three weeks away, the IOC on Monday promised "the toughest sanctions available" after a report found Moscow had concealed hundreds of positive doping tests in many sports ahead of the Sochi winter Games.

The International Olympic Committee (IOC) did not spell out whether it would heed growing calls for Olympic bans already imposed on Russia's track and field athletes and weightlifters to be extended to all its competitors in Rio.