Oscar Pistorius trial - 13 May - in 60 seconds

The prosecution in the trial of South African Olympic athlete Oscar Pistorius has formally requested that he undergo a mental observation.

Prosecution lawyer Gerrie Nel made the application after testimony from forensic psychiatrist Merryll Vorster.

Judge Thokozile Masipa said she would announce her decision on Wednesday.

Mr Pistorius denies intentionally killing his girlfriend Reeva Steenkamp on Valentine's Day last year.

Watch key moments of the trial from 13 May 2014.