Women's 100m champion fails doping test

The Nigerian's sample contained the banned stimulant methylhexaneamine, which was added to the World Anti-Doping Agency's (WADA) list of banned substances for the first time this year.

The 24-year-old's suspension was extended after a hearing on Monday and she will keep her gold medal until after her B sample is tested.

"(The) B Sample result is expected within 48 hours from the time of the request so further details are not expected until Wednesday morning," said a Games Federation statement.

Oludamola took gold after Australian Sally Pearson, who crossed the line first in Thursday's race, was disqualified for a false start three hours after the finish.

Natasha Mayers, who crossed the line third in the blue riband sprint to take St Vincent and the Grenadines' first athletics medal, will be elevated to gold medallist if Oludamola is stripped of the title.