Authorities intercept envelope addressed to White House with ricin: report

'At this time, there is no known threat to public safety,' the FBI said. An envelope addressed to the White House and containing the deadly substance ricin was reportedly intercepted on Saturday, according to reports. A law enforcement official told The New York Times that investigators believed it came from Canada. The letter was intercepted at a government facility that screens mail addressed to the White House and President Trump, a law enforcement official told AP.-- More...