President Barack Obama has vowed that the US will not "leap before we look" in response to Syria's alleged use of chemical weapons.
At a press conference, as part of a visit to Costa Rica, Obama said he does not foresee a scenario in which he would dispatch US troops to Syria.
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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.