The FBI is investigating letters containing suspicious substances that were sent to election offices and congressional offices, according to AP News. The mailings reached election officials in three states, Yahoo reported, while the Washington Post said suspicious materials were also sent to Senate Minority Leader Chuck Schumer and other members of Congress.
The Honolulu Star-Advertiser noted that the suspicious mailings arrived around the anniversary of the 2001 anthrax attacks, when letters laced with anthrax spores were sent through the U.S. mail. That context was cited by the outlet in its coverage of the current investigation.
AP News reported the story on Thursday, October 15, 2026, and said the FBI is leading the inquiry into the letters. The reports did not specify what the substances were or whether anyone was harmed.
Authorities have not announced any arrests or identified a suspect in connection with the mailings, based on the information released so far.
What to watch next: whether the FBI confirms the nature of the substances and releases further details on the scope of the investigation.