FBI probes suspicious letters with DSA return address

The FBI, US Postal Inspection Service and Capitol Police are investigating a series of suspicious mailings containing unknown substances sent to congressional offices and election-related facilities across the United States ^[1]. The alerts were issued to Hill staff after envelopes bearing a return address linked to the Democratic Socialists of America (DSA) were intercepted. One envelope was postmarked with 'DSA' and displayed a return address in the Financial District, the same location previously used by the DSA on membership forms.

The Senate was informed via a message from the Senate Sergeant at Arms, obtained by The Associated Press ^[3]. Authorities are urging recipients to treat the letters as potentially hazardous and have not confirmed whether any have been delivered ^[1]. Some of the letters were intercepted at addresses beyond congressional offices, indicating a broader distribution.

The FBI has confirmed the investigation, stating that some letters contained an unknown substance and that they are working with law enforcement partners to identify those responsible ^[3]. The probe comes just three weeks before Election Day, heightening concerns over election security. This follows a similar incident in 2023, when several election offices received envelopes containing fentanyl.

The DSA has not responded to requests for comment ^[1]. The FBI, Postal Inspection Service and Capitol Police have not yet issued public statements. Officials are actively working to intercept any additional letters before delivery.

The investigation remains ongoing, with no suspects identified as of yet. The story was first reported by New York Post and Sky News.