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US-based terror ‘sleeper cells’ could be ramping up after attack on Iran: ‘On high alert’

  • American counterterrorism agencies are monitoring suspected sleeper cells within the U.S. and have increased security and surveillance following joint U.S.-Israel strikes on Iran's leadership, including Supreme Leader Ayatollah Ali Khamenei.
  • FBI Director Kash Patel has placed counterterrorism and intelligence teams on high alert to address any threats on U.S. soil, with Homeland Security Secretary Kristi Noem coordinating with federal partners to monitor and prevent potential threats.
  • Former assistant FBI director Chris Swecker highlighted that Iran-backed groups like Hezbollah and Hamas have had sleeper cells in the U.S. for decades and may be activated to retaliate for the strikes against Iran.
  • Experts have linked concerns of infiltration by terror sympathizers to recent open-border policies, though no specific threats have been identified, and the threat environment could escalate depending on overseas developments.
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The Post Millennial broke the news in Toronto, Canada on Sunday, March 1, 2026.
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