A message purporting to be from Blade Runner Oscar Pistorius to his fans thanking them for their support was a fake, the Olympian's family has said.
The athlete, released on bail on Friday after being charged with premeditated murder over the Valentine's Day death of his girlfriend Reeva Steenkamp, has not issued any public comments.
It was thought that a message on his elder brother Carl's Twitter account was penned by the double amputee, but a spokeswoman later said this was not the case and that the account had been hacked.
The message, thanking "every person that has prayed for both families" and signed by "Osca" was posted using the @carlpistorius handle.
Pistorius family spokeswoman Janine Hills said: "Carl did not tweet this afternoon, out of respect to Oscar and Reeva. We are busy cancelling all the social media sites for both Oscar's brother and his sister."
As of this evening, Carl Pistorius's Twitter account had been taken down while those belonging to his brother and sister Aimee remained.
Paralympic athlete Pistorius, known as the "Blade Runner", was granted bail following a four-day hearing in Pretoria, South Africa, a week after he shot Steenkamp dead at his home.
He claims that when he fired shots through his bathroom door, he believed he was shooting at an intruder. Prosecutors say Pistorius intended to kill the model however.
A funeral service for the 29-year-old law graduate took place last week.
The father of Ms Steenkamp has warned the 26-year-old athlete will have to "live with his conscience" if he is lying about how he killed her.