Federal Agencies Investigate Suspicious Mail Sent to Congressional and Election Offices

Biloxi Gulfport, MS, October 15, 2026 —

Federal authorities are investigating letters containing suspicious substances that were sent to congressional and election offices nationwide. The FBI, U.S. Postal Inspection Service and U.S. Capitol Police are involved in the inquiry.

Officials have warned recipients to treat the mailings as potentially hazardous. The available information does not specify what substances were found, how many letters were involved or whether anyone was exposed or injured.

Several states have reported either the interception or receipt of letters. The states and the offices involved were not identified in the information provided. It also does not say when the mailings were sent, where they originated or whether investigators have identified a suspect.

The reports include both letters intercepted before delivery and letters received by offices, but no further details were provided about the circumstances of either. The agencies’ involvement confirms that federal and law-enforcement authorities are examining the incidents; the scope and findings of the investigation have not been disclosed.

Authorities have not provided details about any testing, inspection outcomes or follow-up actions. No information was provided about whether the letters are connected to one another or whether additional mailings have been reported. The inquiry remains focused on mail sent to congressional and election offices, according to the summary of the reports.

With key details unavailable, the nature of the substances and the potential hazard remain unclear. The warning to treat the mailings as potentially hazardous is the only specific guidance described in the information provided.

Story summarized from the original created by Associated Press on www.wxxv25.com, see more information here.