Fancy Bear, the Russian-sponsored hacker group, recently conducted “significant cyberattacks” on 16 national and international sports and anti-doping organizations, and at least some of the offensives were successful, Microsoft said on Monday.

The attacks began on September 16, just days ahead of news reports that the World Anti-Doping Agency, often known as WADA, had opened proceedings against Russian athletes after finding inconsistencies in lab data.

US athletes’ doping tests published by Russian hackers, agency says

The attacks are only the latest brazen steps the group has taken to shield against or retaliate for allegations of cheating by Russian Olympic athletes.

In 2016, WADA blamed Fancy Bear for a hack that stole confidential medical data.

Two years later, hackers WADA identified as Fancy Bear published private emails taken from the International Olympic Committee.

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