A Mississippi martial arts instructor has been charged with attempting to use a biological weapon, the US Department of Justice has announced.
James Everett Dutschke, who is 41, was arrested following searches at his home and a former business, as part of an investigation into ricin-laced letters sent to President Barack Obama and two other public officials.
If convicted, Dutschke faces maximum possible penalties of life imprisonment, a $250,000 fine and five years of supervised release.
He is expected to appear in the United States District Court in Oxford, Mississippi, on Monday.
More top news
A woman in Thailand killed herself by jumping into a pond of crocodiles at a popular tourist attraction, Thai police said.
A bizarre Taiwanese report on shows CGI versions of Alex Salmond, Alistair Darling and the Queen explaining the Scottish referendum.
Actor Gerard Depardieu claims he shot two lions on holiday in Africa and that he can drink up to 14 bottles of wine a day.