Pistorius sent bouquet of flowers to the Steenkamp family last Monday, ahead of Reeva's funeral. A handwritten note was attached, a spokesperson has said.
They added that details of any other contact between Oscar Pistorius and Reeva's family are private.
Oscar Pistorius' brother's Twitter account was hacked into and a tweet was sent out which read "thank-you to every person that has prayed for both families", a family spokeswoman said.
– Pistorius family spokeswoman
It is most unfortunate that during this sensitive time, someone would choose to hack into Oscar Pistorius' older brother's Twitter handle.
Carl Pistorius 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.
The tweet which was posted earlier has now been deleted.
Oscar Pistorius' brother Carl posted a message on Twitter, as Oscar spent his first day on bail. The message thanked those who had prayed for the families of both Oscar and Reeva, but it was not clear whether the message was from Carl or his brother.
Thank-you to every person that has prayed for both families, OscaFrom @carlpistorius on Twitter:
There were cheers of relief from the supporters of Oscar Pistorius after the Paralympic athlete was today granted bail, meaning he won't have to remain in prison until his trial in June.
The family of Reeva Steenkamp, the girlfriend he is accused of murdering, were not present to hear the decision.
Africa Correspondent Rohit Kachroo reports on the climax of an extraordinary hearing:
Oscar Pistorius is now at a relative's house with his family, after being granted bail today.
Oscar Pistorius has left court after being granted one million rand (approx £74,000) bail.