Prince Harry has begun inspecting an international fleet of warships in Sydney Harbour.
The Prince was joined by Governor-General Quentin Bryce and Australia's Prime Minister, Tony Abbott MP in front of thousands of spectators on the shore line.
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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.