The Russian sports minister has said no-one will face criminal charges over the worst doping scandal in the country's history.
A report in November by a World Anti-Doping Agency (Wada) commission alleged systematic, state-sponsored drug use in Russian track and field and a widespread cover-up of doping.
The former head of the Russian track federation was accused of a role in extorting €450,000 from a marathon runner and was later banned for life from global track and field.
Sports minister Vitaly Mutko told Russian sports portal Sportfakt that Russian prosecutors "carefully examined the report in question and did not find a single legally supported fact to open any kind of case".
The Wada report led to Russia being suspended from all international track and field, including the Olympics.
Mr Mutko admitted that Moscow had been forced to withdraw players from its national teams at major competitions because of the risk they could test positive for meldonium, a drug for patients with heart disease which was widely used as a supplement in Russian sports but was banned for 2016.
The ban prompted a spate of positive tests among top Russian athletes, including tennis star Maria Sharapova.
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[/raw]Russia dumps U-18 hockey team amid doping reports https://t.co/E61ezOXLBl pic.twitter.com/1ojTkIlEgm
— CBC Sports (@cbcsports) April 7, 2016
Mr Mutko's comments came a day after almost the entire Russian national under-18 hockey team was cut from next week's world championships and replaced with an apparently weaker under-17 squad. The change was announced the day before the under-18 team had been expected to fly to the US.
He said some players had taken meldonium while it was still legal but that Russian officials feared it could have remained in their bodies.
"If an athlete or a group of athletes took it in October or November, we don't know if it'll be found or not (in testing)," he Mutko said in comments reported by the state news agency Tass. "We're minimising risks."
He did not explicitly link his comments to the hockey situation. Russian Hockey Federation president Vladislav Tretiak previously said the roster change was "tactical".
It was the latest in a string of surprise team changes in Russian sports in recent weeks.
The entire national men's curling team was changed a day before its world championships, with the Russian Curling Federation denying a link to meldonium. The replacement team went on to lose nine of 11 games.
In volleyball, Russian club Gazprom Yugra dropped its top players ahead of the final of the European CEV Cup, which it lost. No explanation was given.
