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Politics · October 15, 2026

Capitol Police probing suspicious letters mailed with DSA-linked return address

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Federal authorities, including the FBI, U.S. Postal Inspection Service, and Capitol Police, are investigating a series of suspicious mailings containing unknown substances sent to congressional and election offices across the United States. The investigation was triggered just weeks before Election Day after offices in states such as Louisiana, Oklahoma, and Ohio were targeted. A notice issued by the Senate Sergeant at Arms included an image of an envelope bearing a return address formerly used by the Democratic Socialists of America (DSA). The DSA has stated they have not occupied that address since 2013, and authorities have not confirmed any involvement by the organization. No injuries have been reported, but recipients are urged to treat all suspicious mail as potentially hazardous.

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Reported across the spectrum

  • The FBI, U.S. Postal Inspection Service, and Capitol Police are investigating suspicious letters sent to congressional and election offices.
  • The letters contain unknown substances and are being treated as potentially hazardous.
  • The Senate Sergeant at Arms issued a warning to congressional staff about the mailings.
  • Election offices in multiple states, including Ohio, Louisiana, and Oklahoma, have been targeted or received intercepted mail.
  • Law enforcement is attempting to intercept further mailings before delivery.

Reported by only some outlets

  • One envelope featured a return address at 75 Maiden Lane in New York City.
  • The return address on the envelope was postmarked or labeled 'DSA'.
  • The DSA stated they have not used the 75 Maiden Lane address since 2013.
  • The incident occurred on the 25th anniversary of the 2001 anthrax attacks.
  • Recent mailings were reminiscent of 2023 incidents involving fentanyl-laced envelopes sent to election offices.

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