Security has been tightened across France following warnings of possible attacks.<br /><br />The Eiffel Tower in Paris has been evacuated several times in the last two months and on Thursday, Osama bin Laden released a tape threatening to kill French citizens kidnapped in Niger.<br /><br />There are more than five million Muslims in France, and they already feel targeted by the police.<br /><br />As Al Jazeera's Jacky Rowland reports, allegations that there are terrorists lurking in their midst could make the community feel more marginalised.
