South Africa has made an official complaint that athletes are switching the size of their running blades after Paralympic star Oscar Pistorius claimed longer prosthetics gave a rival an unfair advantage.
The International Paralympic Committee (IPC) received a letter yesterday morning alleging that athletes had changed the length of their blades, breaking competition rules.
As things stand, it is against the rules to swap blades mid-competition.
Staff spoke to coaches in the athletes' village yesterday but found no evidence to back the South African claims.
Former Formula One driver Alessandro Zanardi told ITV News that winning gold in the handcycling was a moment of "a little bit of sadness".
Oscar Pistorius is back in action in the T44 100m Heats after his outburst after losing to Brazalian Alan Oliveira in the T44 200m final.