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Federal prosecutors say the FBI has broken up an ISIS-linked network stretching from Michigan to New Jersey , charging several young men in a coordinated investigation that allegedly involved plans for a Halloween mass shooting and efforts to join the Islamic State abroad.

Tomas Jimenez-Guzel, 19, of Montclair, New Jersey, and Saed Mirreh, 19, of Kent, Washington, were arrested this week in a New Jersey case tied to others already charged in Michigan.

The Justice Department announced the new charges Wednesday, calling the probe a "sprawling federal investigation" into extremists who used encrypted messaging to communicate. U.S. Attorney Alina Habba said the New Jersey defendants "had pledged themselves to ISIS" and were

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