GLASGOW -- The Commonwealth Games Federation says a 16-year-old Nigerian weightlifter has been stripped of her gold medal after a positive doping test.

Chika Amalaha tested positive for diuretics and masking agents after winning the 53-kilogram (117-pound) division last Friday, becoming the youngest ever female to win a weightlifting title at a Commonwealth Games.

The CGF said Friday the backup "B" sample also came back positive.

The federation said Amalaha "has been disqualified from her event at the games" and has returned her medal.

The gold now goes to Dika Toua of Papua New Guinea.