The World Anti-Doping Agency (WADA) has revealed that it has been hacked by a Russian cyber espionage group.
WADA confirmed Tuesday that a database containing information, including confidential medical data, was accessed illegally in cyber-attacks that are "ongoing."
Russian track and field athletes along with some athletes from other sports were banned from competing in the Rio Olympic Games last month after an independent commission found evidence of state-sponsored doping.
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And WADA gave details of another twist in the doping scandal on Tuesday.
A WADA statement said: "The World Anti-Doping Agency (WADA) confirms that a Russian cyber espionage group operator by the name of Tsar Team (APT28), also known as Fancy Bear, illegally gained access to WADA's Anti-Doping Administration and Management System (ADAMS) database via an International Olympic Committee (IOC)-created account for the Rio 2016 Games.