The US Department of Homeland Security order banning DeepSeek from civilian federal agencies was dated July 24, 2026 and signed by Homeland Security Secretary Markwayne Mullin

From the articleUS Moves to Bar DeepSeek From Federal Agencies and ContractsAlso in US orders civilian federal agencies to remove DeepSeek from their systems, Notice of Order Regarding Exclusion and Removal of DeepSeek Products from Federal Civilian Executive Branch Information Technology Systems and Procurements