Jani Chathurangani de Silva, a double medallist at the Games, tested positive for the anabolic steroid nandrolone and was summoned before an official inquiry committee.

"She told this morning's inquiry that she had not taken any banned drugs," Doctor Geethanjana Mendis, the head of the government's sports medicine unit, told AFP.

"She had only taken some medicine as treatment for a leg injury."

Mendis said her statement would be referred to another inquiry committee and its recommendations would then be forwarded to the disciplinary committee of the Athletics Association of Sri Lanka.

If proved guilty, Silva would lose both her 4x100m relay gold medal and the 100m silver.