(Reuters) - Ekaterina Poistogova-Guliyev looks set to lose her silver medal from the 800 metres at the London Olympics after being banned for four years for historic doping by the Russian Athletics Federation (RusAF).

The 33-year-old, who competed for Russia before switching allegiance to Turkey, had all of her results from July 2012 to Oct. 2014 voided after being found guilty of the use or attempted use of banned substances, RusAF said in a statement.

The punishment was for infractions in 2012 and 2013 and based on data from the Moscow anti-doping laboratory, the statement added.