French President Nicolas Sarkozy announced a new crackdown on violent Islamism after the death of Toulouse killer Mohamed Merah on Thursday. He pledged to step up monitoring of activity on the web and to punish anyone who has travelled abroad to take part in "terrorism".

"Our Muslim compatriots have nothing to do with the crazy motivations of a terrorist," Sarkozy said in a brief televised speech roughly two hours after Merah's death.

But he pledged a crackdown on anyone tempted to become involved with violent Islamist groups, including monitoring activity on the internet.

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