An independent investigation into Russian doping has confirmed widespread cheating, perhaps even more egregious than originally anticipated, according to the AP.

A report by investigator Richard McLaren, which went public on Monday, found at least 312 falsified test results from 2011 to last year's world swimming championships.

McLaren found that Russia's program used "disappearing positive methodology," which included the switching of dirty samples with clean ones to prevent Russian athletes from testing positive.

Vladimir Putin had previously called for an investigation into doping allegations. Getty Images

The International Olympic Committee released a statement in response to the findings in which IOC President Thomas Bach called the Russian activity a "shocking and unprecedented attack on the integrity of sport and on the Olympic Games."

In previous weeks, groups such as the U.S. Anti-Doping Agency had called for a complete ban of Russian athletes from Rio. On Monday after the report's release, USADA CEO Travis Tygart spoke out against the "mind-blowing level of corruption."

The World Anti-Doping Agency has also spoken out against the systematic Russian cheating.

In a statement, the WADA Executive Committee provided recommendations based on McLaren's report, including encouraging the IOC to ban all Russian athletes from Rio:

"The International Olympic Committee (IOC) and the International Paralympic Committee (IPC) to consider, under their respective Charters, to decline entries, for Rio 2016, of all athletes submitted by the Russian Olympic Committee (ROC) and the Russian Paralympic Committee."

In June, the International Association for Athletics Federations banned Russian track and field athletes from participating in the Rio Olympics due to doping violations.

The IOC Executive Board will hold a conference call on Tuesday to take its first steps, which may include sanctions against Russia for the upcoming Rio Olympics, which begin on August 5.