The South African has posted a message on his official website a year to the day since Steenkamp was found dead at his home in Pretoria.

"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," he said.

"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."

Pistorius, 27, is due to go on trial next month accused of the murder of Steenkamp.

Oscar Pistorius, who is due to go on trial next month accused of the premeditated murder of his girlfriend, is a six-times Paralympic champion ©AFP/Getty Images



He claims he mistook her for an intruder and shot her through a toilet door.

Prosecutors allege the death was premeditated after an argument between the couple.

Steenkamp, a 29-year-old South African model, had been dating Pistorius for several months before her death.

Pistorius won double Olympic gold at the London 2012 Paralympics in the 400 metres T44 and the 4x100m relay T42-T46.

The double amputee also won three golds in Beijing 2008 and one gold in Athens 2004, with a total Paralympic medal haul of eight.

His trial is due to begin on March 3.