Nigerian gold medallist Chika Amalaha has been provisionally suspended from the 2014 Commonwealth Games after failing a doping test.

The Commonwealth Games Federation (CGF) announced that the 16-year-old, who won gold in the women's 53kg category last Friday, had violated in-competition anti-doping regulations.

Amalaha provided an 'A' sample shortly after her event, which revealed traces of diuretics and masking agents, and will now have a 'B' sample tested at a laboratory in London tomorrow.

Mike Hooper, chief executive of the CGF, said: "We [have] issued a formal notice of disclosure to an athlete following an adverse analytical finding as a consequence of an in-competition test. That athlete is Nigerian weightlifter Chika Amalaha who was tested on July 25. That athlete has now been suspended from the Commonwealth Games in Glasgow.

"[The substances] are diuretics and masking agents. In general terms, these substances are on the prohibited list for two reasons - firstly in weight category sports they can be used to unfairly aid weight loss - and secondly, their use has been reported in attempts to mask the presence in the body of other prohibited substances.

"The relevant processes, as detailed in our anti-doping standard for the Games, are now being followed and Ms Amalaha has pursued her right to have her 'B' sample tested. This will take place at an accredited laboratory in London tomorrow, July 30. Upon receipt of those results the process will continue."

Papua New Guinea's Dika Toua won silver in last week's weightlifting event.