The news of South African sports star Oscar Pistorius' arrest on suspicion of murder has shocked many fellow Paralympians.
London 2012 Paralympic 200m champion Richard Whitehead tweeted:
Shocking news this morning regards my buddy Oscar P what a tragedy!!! Unbelievable I'm speechless #oscar
Wheelchair racer Shelly Woods, silver medallist in the London 2012:
Woke up to shocking news about Oscar Pistorius, very very sad....
US Paralympic sprinter and 14-time world record holder, April Holmes, tweeted: