Double amputee Oscar Pistorius is free to compete against able-bodied athletes after winning an appeal.

The South African, who is nicknamed Blade Runner because he uses artificial limbs that look like blades, had been banned from able-bodied races in January.

A series of tests suggested the blades gave Pistorius mechanical help but the Court of Arbitration for Sport has overturned the ban, so Pistorius is free in all events sanctioned by the International Association of Athletics Federation.

Pistorius said: "I am thrilled with the panel's findings and hope that it silences many of the crazy theories that have been circulating in recent months about my having an unfair advantage.

"My focus throughout this appeal has been to ensure that disabled athletes be given the chance to compete and compete fairly with able-bodied athletes.

"I look forward to continuing my quest to qualify for the Olympics."