The World Anti-Doping Agency (WADA) says it has acquired new intelligence relating to a Russian state doping program in the lead-up to the 2014 Winter Olympic Games in Sochi.
A WADA statement on Friday said its intelligence and investigations department was "in possession of an electronic file that the department is confident is the Laboratory Information Management System database of the Moscow Laboratory, ie all testing data between January 2012 - August 2015."
WADA investigator Richard McLaren previously revealed institutional doping practices in Russia in two reports which implicated more than 1000 athletes across 30 sports.
He also confirmed the claims of whistleblower Grigory Rodchenkov, the former chief of the Moscow anti-doping laboratory, that tainted urine samples were swapped for clean ones at the Sochi lab during the 2014 Games, with the assistance of Russian security services.
WADA is assessing the new intelligence and says it has briefed the two International Olympic Committee commissions investigating the allegations.
"WADA continues to stand firmly behind the outcomes of the Agency's independent McLaren Investigation," WADA president Craig Reedie said.
"This new intelligence serves to reinforce our requirement of Russian authorities that they too publicly accept the outcomes; so that, we can all move forward in rebuilding public trust and confidence in Russian sport."
Russia has continually dismissed allegations of state-sponsored doping and is seeking the extradition of Rodchenkov from the United States.
The news came after Russia's cross-country skiing federation called the IOC's decision to ban six Russians for life politically motivated.
"It has not absolutely nothing to do with sport," federation president Elena Valbe told reporters at the Russian Olympic Committee. "For me, it's (political)."
Earlier this week Russian President Vladimir Putin suggested allegations of a state-sponsored doping program in Russia were an attempt to sow seeds of discontent ahead of the country's presidential elections in March.
The IOC aims to have a ruling on Russian participation at the 2018 Pyeongchang Winter Games in early December. It refrained from a blanket ban for the Rio 2016 summer Games.
