Oscar Pistorius has apologised for the timing of his comments about the running blades used by gold medallist Alan Fonteles Oliveira.
The South African hit out at the International Paralympic Committee (IPC) for failing to act over the length of some athletes' blades after Oliveira, wearing noticeably longer ones, came from way back to pip him at the line in the T44 200 metres.
The Brazilian took gold in 21.45 seconds, leaving Pistorius to settle for silver, coming home in 21.52secs with stunned quiet from the 80,000 spectators greeting the result.
In a statement Pistorius said: "I would never want to detract from another athletes' moment of triumph and I want to apologise for the timing of my comments after yesterday's race."
The statement continued: "I do believe that there is an issue here and I welcome the opportunity to discuss with the IPC but I accept that raising these concerns immediately as I stepped off the track was wrong.
"That was Alan's moment and I would like to put on record the respect I have for him.
"I am a proud Paralympian and believe in the fairness of sport. I am happy to work with the IPC who obviously share these aims."