An image grab taken from a video made available by jihadist media outlet Welayat Nineveh shows Rachid Kassim, a French member of the Islamic State group. Kassim used the Telegram messaging app to exhort followers to attack targets in France. Photo: Agence France-Presse

French terror investigators grapple with Telegram app, Islamic State’s messaging weapon of choice

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An image grab taken from a video made available by jihadist media outlet Welayat Nineveh shows Rachid Kassim, a French member of the Islamic State group. Kassim used the Telegram messaging app to exhort followers to attack targets in France. Photo: Agence France-Presse
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