The FBI has arrested an Oklahoma City man suspected of sending hundreds of letters containing white powder to public officials and election offices nationwide, a federal law enforcement source told Fox News Digital.
The suspect's initial court appearance is scheduled for Tuesday afternoon. The investigation, a joint effort involving the FBI's Oklahoma City field office, the FBI Criminal Division, the U.S. Postal Inspection Service, U.S. Capitol Police, and the Oklahoma City Police Department, targeted more than 100 locations.
These suspicious mailings occurred during the 2024 and 2026 election cycles and were sent to various addresses, including multiple secretary of state and election offices. The FBI had previously warned recipients to treat the mailings as potentially hazardous while authorities worked to intercept additional letters.
In an advisory on October 23, the FBI stated that laboratory testing had not identified any hazardous materials in the suspicious substances analyzed up to that point, although testing was ongoing. Several Senate offices had reported receiving or being sent suspicious mail, with some letters addressed to offices of Senators Alex Padilla, D-Calif., Kirsten Gillibrand, D-N.Y., and Lisa Blunt Rochester being intercepted by postal authorities and Capitol Police, respectively.
Similar letters were sent to election offices in more than 15 states during the 2024 election cycle, prompting evacuations and hazmat responses. Authorities later determined some of these substances were harmless.
The Associated Press contributed to this report.