On Saturday, the FBI said it was investigating an intercepted and suspicious letter addressed to President Donald Trump. It is unclear when the writing was sent and where it was intercepted. The deadly toxin in very small quantities causes nausea, vomiting, organ failure, and eventual death. There is no known antidote. Ricin was discovered at an outside facility that checks mail destined for the White House.
Tests show that the letter actually contains the toxin. The suspect also allegedly sent other messages to federal prisons, which were discovered in various facilities, an official told NBC News on Saturday. It was not immediately clear to which prisons the messages were sent or who the recipients were. It is said that only one letter was addressed to a politician.
In the past decade, there have been more threats to carry out ricin attacks in the United States. Prominent figures also received mail with poison. They included former President Barack Obama and billionaire Michael Bloomberg, the mayor of New York at the time. The actress who sent the letters in 2013 was sentenced to eighteen years in prison.