The prosecutor has said that an unlicensed .38 handgun was found in Oscar Pistorius' home.
Reeva Steenkamp was shot in the head, arm and hip, the prosecutor added.
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Elsewhere it will be largely sunny, though with gusty winds at times, and a few showers likely in places.
Heavy rain has caused widespread flooding and travel disruption across north west England and North Wales.
The actor said he did not remember the latest allegation, but apologised for “inadvertently” causing discomfort.