South African Olympic athlete, Oscar Pistorius has been sentenced to six years in prison for the murder of his girlfriend, Reeva Steenkamp in 2013.

The verdict comes after his initial five-year conviction for manslaughter was changed to murder last December on appeal.

Pistorius, 29, shot Reeva Steenkamp four times through a locked toilet door in February 2013. He admitted shooting her, but said he mistook her for an intruder and acted out of fear.

In an hour-long session, Judge Thokozile Masipa said mitigating circumstances, such as rehabilitation and remorse, outweighed aggravating factors for deviating from the prescribed 15-year sentence for murder.

Pistorius has already served one year in jail over his previous conviction and he is legally obliged to serve half of his new sentence in prison before being eligible for parole.

Right after the session, he was transferred to Khosi Mampuru prison in Pretoria.

The six-time Paralympic gold medalist made history by becoming the first amputee sprinter to compete at the Olympics, in 2012 in London, running on prosthetic “blades”.