Feds investigating letters with 'suspicious substances' sent to congressional offices

ABC News·October 16, 2026 at 1:37 PM+9

abcnews.com

Several federal agencies are investigating "multiple letters containing suspicious substances," that were mailed nation wide, according to a notice sent to Senate staff.

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Feds investigating letters with 'suspicious substances' sent to congressional offices

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Feds probing suspicious letters to election officials, lawmakers

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