Suspicious letters sent to US senators' offices and polling places

The Federal Bureau of Investigation (FBI) and the US Postal Inspection Service are investigating the contents of letters sent to several US senators' offices and to polling places. Investigators are examining whether the packages may contain hazardous substances.

The British broadcaster BBC reported the news. The source text does not say which senators or polling places received the letters, what substances may be involved, whether anyone was harmed, or who may have sent them.

The investigation is ongoing, and no official findings about the contents of the letters have been reported so far. The letters were addressed both to lawmakers' offices and to election facilities, so the case touches both areas.