The FBI, U.S. Capitol Police and U.S. Postal Inspection Service are investigating “a number of letters containing suspicious substances that have been mailed to numerous addresses nationwide, together with a number of Congressional workplaces,” in accordance with a discover despatched to Senate employees on Thursday and described to ABC Information.
Investigators did not instantly disclose extra particulars of the suspicious substances.
Federal regulation enforcement officers are working to intercept the letters, in accordance with the discover.
The Senate Sargent at Arms warned within the discover that some letters might make it to congressional workplaces.
The Senate Sargent at Arms beneficial treating any suspicious letters with warning, and that suspicious letters comprise a number of postage markings, in accordance with the discover.

The Capitol Police referred ABC Information to the FBI for remark.
The FBI confirmed in an announcement Thursday that it was working with the U.S. Postal Inspection Service in a probe over “a collection of suspicious mailings despatched to numerous addresses nationwide, together with Secretary of State workplaces and their associated election workplaces.”
These mailings additionally “contained an unknown substance,” in accordance with the FBI.
“We’re additionally working with our companions to determine the person or people liable for the letters. The FBI and the U.S. Postal Inspection Service will proceed to safeguard the general public and safe elections for Americans,” the FBI mentioned in an announcement.

On this June 16, 2025, file photograph, U.S. Capitol Police Officers stand guard exterior of the U.S. Capitol Constructing in Washington, D.C.
Anna Moneymaker/Getty Photos, FILE
It’s unclear whether or not these letters are related to the letters lately despatched to Secretaries of State’s workplaces across the nation.
