London, December 12 : Paralympic runner Oscar Pistorius has been reportedly fuming since learning he could still face a charge of murder for shooting deceased girlfriend Reeva Steenkamp .

Pistorius, who is serving a five-year jail sentence for killing his girlfriend, was acquitted of murder charges and was found guilty of culpable homicide.

Earlier, a South African court has ruled that prosecutors can appeal Paralympic runner Oscar Pistorius' murder conviction charges but has dismissed the State's bid to appeal the double amputee's sentencing.

A fellow inmate reportedly revealed that Pistorius got up immediately after hearing the news and went straight to the gym, adding that he started lifting weights as he was very angry, the Mirror reported.

He further said that he was fuming as he was expecting to be out on house arrest in August.

The Blade Runner could face up to face 15 years in jail, if murder conviction charges are proved. (ANI)