South African Paralympic athlete Oscar Pistorius has been arrested over the fatal shooting of his girlfriend at his home in Pretoria.
The BBC quotes the South African media as saying that the Police said a 26-year-old man, who they have not named, was in custody and a case of murder was being investigated.
The precise circumstances surrounding the incident are unclear. Reports say he may have mistaken her for a burglar.
Mr Pistorius, 26, is known as the "blade runner", and was the first double amputee to run in the Olympics.
The suspect is expected to appear in court later on Thursday, reports say.
The news that he may have killed his girlfriend will shock the country as the athlete is regarded as one of South Africa's national icons.
'Fatally wounded' The incident is said to have taken place between 04:00 and 05:00 local time (02:00-03:00 GMT).