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Authorities investigate letters with 'suspicious substances' sent to congressional, election offices

First seen Oct 15, 2026, 11:59 AM ET · Updated Oct 15, 2026, 12:38 PM ET · 3 outlets

3 outlets (NBC News, PBS NewsHour and ABC News) are covering this story.

• NBC News reports: “The FBI, U.S. Capitol Police and U.S.”
• PBS NewsHour reports: “Federal authorities are investigating letters that have been mailed to congressional and election offices nationwide and are urging recipients to treat the mailings as "potentially hazardous."”

Read the full coverage

• NBC News: Federal authorities investigate suspicious mailings sent to congressional and secretary of state offices
• PBS NewsHour: Authorities investigate letters with 'suspicious substances' sent to congressional, election offices
• ABC News: Authorities investigate letters with 'suspicious substances' sent to congressional, election offices