Oscar Pistorius has broken down in tears at his trial for the murder of Reeva Steenkamp.

A doctor who went to help his fatally wounded girlfriend has described how it was too late to save her.

Radiologist Johan Stipp - who's a neighbour of the Paralympian - rushed to his house after hearing what he thought were gunshots.

He's told court he didn't realise who the couple were - and the athlete was extremely distressed: