Oscar Pistorius was accused of being a deceitful witness who told the court "incredible lies" at the summing up of his murder trial.
Prosecutor Gerrie Nel said he was more interested in defending his life than telling the truth.
ITV News Africa Correspondent Rohit Kachroo reports.
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The announcement came a day after a famine was declared in two areas of South Sudan following three years of civil war and severe inflation.
It is unclear what their alleged plans were.
Anti-terror police are currently questioning the men who were arrested at three separate locations in France.