Olympic athlete Oscar Pistorius's brother Carl Pistorius, center, walks outside the magistrate court in Pretoria, South Africa, Tuesday, February 19, 2013. (AP Photo/Themba Hadebe)

Johannesburg - Oscar Pistorius' family was disappointed on Saturday that someone hacked his brother Carl's Twitter account.

This followed tweets about the paralympian allegedly being thankful for prayers and support given in his murder case, Pistorius' PR company said.

“It is most unfortunate that during this sensitive time, someone would choose to hack into Oscar Pistorius older brother, Carl Pistorius' Twitter handle,” said Janine Hills from Vuma Reputation Management.

She said they picked up the story from local radio news that Oscar's brother tweeted that the paralympian was thankful for “prayers” offered during his bail application after he allegedly shot his girlfriend Reeva Steenkamp dead.

“I spoke to Oscar myself (and) I spoke to his brother and they said they didn't tweet,” said Hills.

“We are busy cancelling all the social media sites for both Oscar's brother and his sister (Aimee).”

Oscar has been charged with murder after his girlfriend Reeva Steenkamp was shot in his home on February 14.

In his affidavit he said he thought there was an intruder.

Pretoria Magistrate Desmond Nair granted him bail of R1million on Friday with severe restrictions on his movement.

Pistorius was ordered to return to court on June 4. - Sapa