Johannesburg - South Africa's amputee sprinter Oscar Pistorius underwent emergency surgery in a Johannesburg hospital Sunday following a boating accident, the Sapa news agency reported.
"We are not sure what happened at this stage, we are still trying to establish it," Pistorius's manager Peet van Zyl said.
Meanwhile local radio reported that Pistorius, who is nicknamed "Blade Runner" because of the prosthetic legs that enable him to sprint, was in a serious but stable condition and had been placed on a ventilator in an intensive care unit in Milpark Hospital.