Nigerian 110 metres hurdler Samuel Okon has tested positive for the banned stimulant methylhexaneamine, Games Federation chief Mike Fennell said on Tuesday.
Compatriot and women’s 100 metres gold medallist Osayemi Oludamola tested positive for the same substance and was suspended on Monday pending the analysis of her B sample.
Okon, who finished sixth in the sprint hurdles final last Friday, had waived the right for his B sample to be tested, Fennell said, although the Federation were waiting for personal confirmation of this.
Methylhexaneamine, a stimulant commonly used in nasal decongestants, was added to the banned list of the World Anti Doping Agency (WADA) for this year.
Media reports in Nigeria said Oludamola blamed a toothache remedy for the traces of the banned substance being found in her sample. The result of her B sample is expected to be known on Wednesday.
Fennell said some 1,200 doping had taken place over the Games so far with the only two positives coming from the two Nigerians.