Federal Authorities Investigate Potentially Hazardous Substance Sent to Political Offices Nationwide

Federal law enforcement agencies are investigating letters containing 'suspicious substances' that have been mailed to multiple congressional and election offices across the United States. The FBI, U.S. Postal Inspection Service, and U.S. Capitol Police are spearheading the probe, with agents advising recipients to treat the materials as 'potentially hazardous.'

The investigation was initially disclosed in a notification to Senate offices on Thursday, which stated that law enforcement was working to intercept additional mailings but acknowledged that some might reach their destinations. "Some of the letters contained an unknown substance and we are working closely with our law enforcement partners to respond to each incident," the FBI said in a statement. The agency added that efforts are underway to identify those responsible.

Several Democratic senators confirmed receiving suspicious letters. Offices of Senators Lisa Blunt Rochester and Chris Coons of Delaware reported receiving such mail. Senator Alex Padilla of California stated that the Postal Service intercepted a suspicious package before it reached his office, and Senator Kirsten Gillibrand reported that postal inspectors intercepted a suspicious mailing addressed to her New York City office. A spokesperson for Senator Chris Murphy of Connecticut confirmed his office received a letter with a suspicious substance, noting that due to safety protocols, the senator and staff were not in immediate danger.

While the threat appeared to be concentrated in the Senate, the House of Representatives was monitoring the situation. The incidents have also affected election offices in various states. Mailed packages containing a powdery substance led to the evacuation of election offices in Louisiana and Oklahoma earlier in the week. The Ohio secretary of state's office reported that the Postal Service intercepted a package with a white powder intended for them, and similar mailings were sent to election officials in multiple other states, including Idaho and Florida. The Wisconsin Elections Commission reported receiving a letter with a white powder, which subsequent tests determined was not hazardous.

These events occur approximately three weeks before Election Day and echo similar incidents in 2023, when election offices in six states received mailings containing a white powder. Some of those letters included threats and traces of fentanyl, prompting some election offices to acquire naloxone, an overdose reversal medication.

The National Association of Secretaries of State and the National Association of State Election Directors issued a joint statement condemning the threats against election staff, emphasizing that those who administer elections should not fear for their safety. Deputy Postal Inspector Brendan Donahue stated that any threat or attack on election officials is unacceptable and that efforts are ongoing to identify the perpetrators.