Prosecutors in the Oscar Pistorius case have consulted with a criminal law expert over a possible appeal, which means the Olympic runner could face a murder conviction again.

Prosecution spokesman Nathi Mncube confirmed Friday that chief prosecutor Gerrie Nel has consulted with Prof. James Grant over appealing.

Grant wrote on Twitter that he has advised Nel to appeal and agreed to assist prosecutors.

Criminal experts have said there may be grounds for prosecutors to appeal Judge Thokozile Masipa's decision to acquit Pistorius of murder for the shooting death of girlfriend Reeva Steenkamp. Masipa instead found the double-amputee athlete guilty of the lesser charge of culpable homicide.

Pistorius was given a five-year prison sentence. He faces a minimum of 15 years in jail if found guilty of murder on appeal.