Russia’s sports minister said yesterday he was prepared to resign over a raging doping scandal in his country which could cost more Russian athletes their places at the Rio Olympics after “tens” more cases of cheating were exposed in wrestling.

Russian wrestlers may now join the country’s track-and-field athletes in being barred from competing at the Games in August, after an internal Russian Wrestling Federation (WFR) investigation uncovered multiple doping cases, WFR president Mikhail Mamiashvili said.

The disclosure came a day after four Russian athletes were exposed as having tested positive for the banned drug meldonium, further damaging Moscow’s efforts to overturn a doping suspension in time for the Olympics starting in Rio on August 5.

Russian President Vladimir Putin said yesterday his sports minister, Vitaly Mutko, would remain in his position despite the scandal.

Mutko later said, however, that he was prepared to end his eight years in the job if asked to do so.

“The country has a leadership who take these decisions. When I see that the matter concerns me, I will leave my post,” R-Sport news agency quoted him as saying.

Russian sport was thrown into turmoil last year when a report by the World Anti-Doping Agency (WADA) exposed en-demic cheating and corruption in Russian athletics.

Mamiashvili said two male wrestlers, 2014 world championship silver medallist Evgeny Saleev and 2015 World Cup silver medallist Sergei Semenov, had been caught using meldonium.

But he said the sport’s doping problem was widespread.

“There are tens of positive tests in the team, everyone is in a bad condition,” Mamiashvili said.