# Federal probe into suspicious mailings to election offices > Live situation record from CLSTR: https://clstr.news/situations/oklahoma-state-election-board-security-incident > Updated: 2026-10-24T23:20:02.000Z. Sources: 97. Developments: 6. The Oklahoma State Election Board offices were evacuated following the discovery of an envelope containing a suspicious white powder. State Election Board Secretary Paul Ziriax confirmed the substance was non-hazardous and no staff were harmed. This incident is part of a broader federal investigation involving the FBI, the U.S. Postal Inspection Service, and the U.S. Capitol Police. Authorities are probing a nationwide wave of suspicious mailings containing unknown white or brown powdery substances sent to various congressional and election offices. Some intercepted envelopes featured a postmark from ‘DSA’ and a return address linked to a building previously used by the Democratic Socialists of America; however, the organization noted it has not occupied that location since 2013. The scope of the mailings has expanded significantly. In addition to previous reports in Louisiana, Ohio, Delaware, Connecticut, Maryland, Mississippi, South Dakota, Pennsylvania, New York, Wyoming, and Idaho, the Wisconsin Elections Commission and the Delaware State Election Commissioner’s Office also reported suspicious letters. Targeted recipients now include high-profile U.S. lawmakers, such as Senate Democratic Leader Chuck Schumer and Senators Alex Padilla, Chris Murphy, Kirsten Gillibrand, and Lisa Blunt Rochester. Recent reports indicate that Minnesota Secretary of State Steve Simon, Senator Amy Klobuchar, and Representative Hillary Scholten have also received suspicious mailings. In Minnesota, the Secretary of State’s office reported receiving a mailing containing both a threatening letter and an unidentified white powder. As of Friday, at least 36 members of Congress from both Democratic and Republican parties have reported receiving suspicious letters. Targeted offices also include California representatives Jimmy Panetta and Kevin Kiley, as well as Senators Ted Cruz and Susan Collins. Recent developments show the wave of mailings has reached Oregon and Arizona. The investigation has now reached at least 32 states. ## Claims - An employee in Louisiana was taken to the emergency room as a precaution after opening a suspicious letter, but no injuries were reported. (disputed by 4 sources) - No injuries or illnesses have been reported from the mailings. (disputed by 3 sources) - The FBI, U.S. Postal Inspection Service and Capitol Police are investigating letters containing suspicious substances mailed to congressional offices. (corroborated by 29 sources) - The FBI and U.S. Postal Inspection Service are investigating a series of suspicious mailings sent to various addresses nationwide, including Secretary of State offices and their related election bases (corroborated by 21 sources) - Some of the mailings contained a powdery white substance. (corroborated by 19 sources) - The U.S. Postal Service intercepted a suspicious letter containing white powder addressed to Ohio Secretary of State Frank LaRose. (corroborated by 18 sources) - Election offices in Louisiana and Oklahoma were evacuated after receiving envelopes containing a white powder. (corroborated by 17 sources) - Authorities have urged recipients to treat the suspicious mailings as potentially hazardous. (corroborated by 12 sources) - The Senate Sergeant at Arms warned congressional staff that suspicious mailings might still reach their destinations. (corroborated by 9 sources) - A series of suspicious letters was sent to state election offices. (corroborated by 9 sources) ## Timeline ### 2026-10-24: FBI investigates nationwide suspicious mailings to election officials and lawmakers Federal authorities are investigating a nationwide series of suspicious mailings containing white powder sent to U.S. lawmakers and election officials. One man in Illinois has been charged in connection with a' 6 sources. https://clstr.news/cluster/fbi-investigates-suspicious-mail-sent-to-us-election-and-congressional-offices ### 2026-10-21: US officials investigate suspicious mailings targeting Congress and election offices The FBI and postal inspectors are investigating a series of suspicious mailings containing white powder sent to over 36 members of Congress and dozens of election offices across the United States. 15 sources. https://clstr.news/cluster/ap-norc-poll-shows-declining-democratic-faith-in-election-results ### 2026-10-19: US Lawmakers and Election Offices Targeted by Suspicious Mailings The FBI is investigating a nationwide series of suspicious mailings containing white powder sent to over 36 members of Congress and election offices in 32 states ahead of the midterm elections. 18 sources. https://clstr.news/cluster/fbi-investigates-suspicious-mailings-sent-to-us-election-offices ### 2026-10-16: United States investigates nationwide suspicious mailings to officials The FBI and other agencies are investigating a nationwide series of suspicious mailings containing unidentified powders sent to at least 36 U.S. congressional offices and various state election officials. 19 sources. https://clstr.news/cluster/us-officials-investigate-threatening-letters-with-white-powder ### 2026-10-14: Oklahoma election officials manage short voting window and security incident Oklahoma faces a brief four-day early voting window for the upcoming general election amid concerns over low turnout and a recent non-hazardous white powder incident at the State Election Board office. 3 sources. https://clstr.news/cluster/oklahoma-election-officials-manage-short-voting-window-and-security-incident ### 2026-10-13: U.S. federal authorities investigate suspicious mailings targeting election officials The FBI and other federal agencies are investigating a nationwide wave of suspicious mailings containing white powder sent to U.S. election officials and congressional offices ahead of midterm elections. 41 sources. https://clstr.news/cluster/oklahoma-state-election-board-evacuated-after-white-powder-discovery --- Cite as: Federal probe into suspicious mailings to election offices. CLSTR, https://clstr.news/situations/oklahoma-state-election-board-security-incident