Pistorius says he is consumed with sorrow over Steenkamp’s death

South African Paralympic sprint star Oscar Pistorius said yesterday he was consumed with "sorrow" as he marked one year since he shot dead his model girlfriend on Valentine's Day in what he maintains was an accident.

The world-famous double amputee, 27, shot Reeva Steenkamp through his toilet door, claiming he mistook her for an intruder at his upmarket Pretoria home.

However the track legend known as "Blade Runner" goes on trial for premeditated murder on March 3.

"No words can adequately capture my feelings about the devastating accident that has caused such heartache for everyone who truly loved - and continues to love Reeva," Pistorius wrote on his personal website.

"The pain and sadness - especially for Reeva's parents, family and friends consumes me with sorrow.

"The loss of Reeva and the complete trauma of that day, I will carry with me for the rest of my life," he said in the message signed simply "Oscar".

He also posted a link to the message on Twitter, describing it as "A few words from my heart". It was the first time he has used his official account on the social networking site since February 12, 2013, two days before the shooting.