6 September 2011 Last updated at 11:58

Oscar Pistorius halts BBC Radio 4 interview

South African athlete Oscar Pistorius calls an abrupt end to an interview with BBC Radio 4's Rob Bonnet after rejecting a suggestion he could be considered "an inconvenient embarrassment to the South African authorities and IAAF".

Commenting on the debate surrounding his participation in the World Athletics Championships, Pistorius insists his 'Cheetah' flex-foot blades give him "no advantage" over other competitors.