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Nigerian stripped of Commonwealth Games medals after failed drug test

• 400m silver-medalist Folashade Abugan fails a drug test
• Nigerian 4x400m relay team also stripped of their silver medals

Nigeria's Folashade Abugan has been stripped of her two Commonwealth Games silver medals after failing a drugs test, it was announced today.

Abugan becomes the third Nigerian to fail a drugs test at the Delhi event after the 110m hurdler Samuel Okon and Damola Osayemi, who claimed gold in the women's 100m, both of whom tested positive for the banned stimulant methylhexaneamine. She now faces a ban of up to two years.

Today's announcement came only hours after the Australian Sports Anti-Doping Authority announced it had banned another Nigerian athlete for two years for testing positive for an anabolic agent. ASADA said the Nigerian Olympic sprinter Bowa Lawal tested positive for the prohibited substance methandienone in March at the IAAF's 2010 Melbourne Track Classic.

Nigerian officials at the Commonwealth Games said they were investigating the spate of doping findings. After the second positive was revealed, a Nigerian athletics official said every athlete who prepared for the Delhi Games in Nigeria had undergone out-of-competition testing.

Abugan's A sample showed traces of the testosterone prohormone, which is prohibited under the current World Anti-Doping Agency list, and she subsequently waived the right to have her B sample analysed.

"Abugan's 'A' sample was found to demonstrate findings consistent with an exogenous origin of endogenous steroids… and indicate an application of testosterone prohormone," the CGF said in a statement. She "wrote to the CGF waiving her rights to have her 'B' sample analyzed. She also admitted liability."

She forfeits her silver in the 400m and, as a member of her country's second-placed finish in the 4x400m relay, that result is also nullified.

The silver medal for the 400m will now be awarded to Aliann Tabitha Pompey of Guyana, with the bronze medal going to Christine Amertil of the Bahamas. The chief beneficiaries in the 4x400m are England, who move up a spot to take the silver with the bronze going to Canada.