Russian Athletics announced yesterday that "abnormal haematological curves" have been found in Shobukhova's biological passport. Subsequently she has been stripped of all her results since October 2009 and suspended for two years.
The 36-year-old's 2010 London Marathon title and three Chicago Marathon wins, including her 2:18:20 PB in 2011, will also be wiped from the record books. Shobukhova's suspension is backdated to January 24, 2013 and will end on January 23, 2015.
Shobukhova still has the right of appeal, but if the doping is confirmed she will be required to pay back all prize money and appearance fees from the past five years, including the million dollars she received in 2011 as overall winner of the World Marathon Majors.
Paula Radcliffe, a lifelong anti drug cheat campaigner, said on Twitter: "Fraud on so many levels. So much money effectively stolen in appearance fees, winnings and endorsements."
London Marathon race director Hugh Brasher said in a statement: 'London Marathon is at the forefront of the fight against doping in our sport and we are very proud to have been the first major marathon to introduce blood testing for all of our elite competitors, prior to each event.
'This mandatory blood testing commenced at the London Marathon in 2002 and has continued with all our elite competitors throughout.'
'As one of the world's leading marathons, we continue to work very closely with UK Anti-Doping, the IAAF and WADA (the World Anti-Doping Agency) with the aim of eradicating drug taking in our sport.'