Oscar Pistorius trial day one: Key moments

South African athlete Oscar Pistorius has pleaded not guilty at the start of his trial for the murder of his girlfriend Reeva Steenkamp.

Mr Pistorius shot Ms Steenkamp, 29, a model and reality TV star, at his home in Pretoria on 14 February 2013.

State prosecutors allege the killing was premeditated, but he claims he mistook her for an intruder.

Watch key moments from the first day of the trial.