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San Diego sues federal agencies over razor wire fencing on city land

San Diego alleges illegal fence construction by federal agencies harmed habitats protecting 85 endangered species and blocks city conservation efforts, seeking a court halt to further work.

  • On January 5, the City of San Diego filed a federal lawsuit naming the Department of Homeland Security and Department of Defense over razor wire placed on city conservation land near the Mexican border.
  • The city says the installation caused irreparable harm to protected habitats, riparian areas, and vernal pools within the Cornerstone Lands Conservation Bank Agreement protecting 85 sensitive and endangered species.
  • About a dozen U.S. Marines installed concertina wire in December across Marron Valley, east of Otay Mountain, leaving survey stakes, markers, discarded pallets, unused wire, and abandoned vehicles.
  • The city is asking the court to halt further fence construction and declare its ownership rights, while the Department of Defense declined to comment and the Department of Homeland Security did not respond, framing the case as a new front in federal versus local authority.
  • Beyond local harm, the suit says the fence damages vernal pools hosting endangered fairy shrimp, harms least Bell’s vireo habitat, and blocks city staff management amid recent National Guard rulings.
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San Diego sues federal agencies over razor wire fencing on city land

The city of San Diego is suing the federal government for building razor wire fencing on city land near the Mexican border, arguing that the fence damages sensitive habitat and trespasses on city property.

·United States
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KTVB broke the news in Boise, United States on Wednesday, January 28, 2026.
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