Authorities investigate letters with 'suspicious substances' sent to congressional, election offices

Federal authorities, including the FBI and U.S. Capitol Police, are currently investigating letters containing suspicious substances sent to congressional and election offices across the United States. These mailings were also directed toward secretary of state offices nationwide. Officials are urging all recipients to treat these specific mailings as potentially hazardous while the investigation continues. The authorities are working to determine the nature of the substances and the origin of these hazardous letters sent to government offices.