The Queen and Prince Philip were at Sandringham at the time of the incident.
A Buckingham Palace spokeswoman said they would not comment as it was a police matter.
More top news
June and Barry Steenkamp tell Good Morning Britain they accept the judge's decision but still do not believe Pistorius' version of events.
Fifteen British WW1 soldiers will be reinterred at the Commonwealth War Graves Commission cemetery today, 100 years after their deaths.
Unresolved complaints about energy suppliers could be five times higher than official figures suggest, according to Labour.