RNZ reports Opeloge initially finished in fourth place in the women's over 75kg division, one kilogram shy of the bronze medal winner.
But a re-analysis of samples from eight years ago have found the silver medallist, Olha Korobka from Ukraine, and bronze medallist, Mariya Grabovetskaya from Kazakhstan, tested positive for banned substances.
They are among 15 weightlifters to be provisionally suspended for failing the International Olympic Committee tests and have the option of taking their case to the Court of Arbitration for Sport.
