Heightened security threat in U.S. after Iran strikes, federal law enforcement officials warn

Federal law enforcement officials across the United States have issued warnings of heightened security threats in 2026 following recent strikes against Iran, as concerns grow that Iranian sleeper cells within the country might prepare retaliatory attacks against American targets. The Department of Homeland Security and FBI have reportedly increased surveillance and intelligence gathering operations to identify potential threats, with particular focus on Iranian diaspora communities and known individuals with connections to Iranian Revolutionary Guard Corps. Security measures have been enhanced at critical infrastructure sites, government buildings, and potential symbolic targets across major cities, though officials have not disclosed specific intelligence suggesting an imminent attack. The warnings come amid escalating tensions in the Middle East following the targeted strikes against Iranian military assets, which were reportedly conducted in response to Iranian-backed attacks on U.S. interests in the region. Security experts note that while the threat level has been elevated, there is currently no specific information indicating that an attack is imminent.