By Paul Osborne

Irina Starykh could face an extended suspension after the IBU re-analysed previously stored samples ©Getty ImagesRussian biathletes Ekaterina Iourieva and Irina Starykh could face extended suspensions after the International Biathlon Union (IBU) re-analysed samples that showed atypical results in previous seasons.

Both were suspended earlier in the year after testing positive for banned substance erythropoietin (EPO) prior to the Winter Olympics in Sochi.

Iourieva was handed an eight-year ban for her second offence and Starkh two-years for a first failed test.

The IBU announced that after testing samples stored for potential future analysis, the World Anti-Doping Agency (WADA) found five samples positive for recombinant EPO.

Two of these re-analysed belonged to Starykh and one to Iourieva.

Neither athlete has requested their B-samples be tested.

Starykh's sample was collected in Oberhof, Germany, on January 2, 2014, and Iourieva's samples for re-analysis were collected in Östersund, Sweden, on November 28 and 29, 2013.

Due to the new findings the IBU Anti-Doping Hearing panel has "now to decide about the possibility of increasing the period of ineligibility for both athletes".

Upon failing her second doping test, Iourieva announced her retirement from the sport, seemingly in acceptance of a lengthy ban coming her way.

Ekaterina Iourieva retired from biathlon after failing a second drugs test prior to Sochi 2014 ©Getty ImagesEkaterina Iourieva retired from biathlon after failing a second drugs test prior to Sochi 2014 ©Getty Images

In the latest re-analysis, the IBU also announced the suspension of two further athletes, although no names were given.

The two suspensions came into effect on November 25 and December 15 for the two athletes.

In November the Russian Biathlon Union announced the suspension of Alexander Loginov after failed drugs results taken in November 2013.

The 20-year-old four-time World Junior Championship gold medallist and Sochi Olympian, was withdrawn from the opening World Cup competition in Östersund and will potentially lose a World Cup relay gold and have his Sochi results struck from the history books.

Loginov is believed to be the unnamed athlete detailed in the IBU release, although the athlete banned from December 15 is still unknown.

Biathlon was also rocked during the Olympics in February when two-time Olympic champion Evi Sachenbacher-Stehle of Germany was caught doping.

Her initial two-year ban was reduced to just six-months last month after the Court of Arbitration for Sport deemed that the athlete's adverse analytical finding was caused by contamination and that the athlete's degree of fault was minimal.

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