Oscar Pistorius's lawyer says a decision on the Olympic athlete's early release from prison has been referred back to the parole board.

Lawyer Brian Webber said he has been informed that the parole review board that met on Monday cancelled an earlier decision to release Pistorius and asked officials to reconsider his case.

It could mean Pistorius remains in prison until after November 3, when prosecutors still seeking a murder conviction against the double-amputee runner appeal to South Africa's Supreme Court.

Pistorius was acquitted of murder and instead found guilty of a lesser charge of culpable homicide for shooting Reeva Steenkamp in 2013.

He has served nearly a year of his five-year prison sentence.