The discovery of ricin in a Senate office building this week is the third known incident involving the deadly toxin in the United States since October. The White House was an earlier target, a law ...

BURLINGTON, Vt. -- A retirement community resident made ricin and tested the deadly toxin on her neighbors by putting it on their food or in beverages over a period of weeks, investigators said. Betty ...

BURLINGTON, Vt. (AP) — A retirement community resident made ricin and tested the deadly toxin on her neighbors by putting it on their food or in beverages over a period of weeks, investigators said.

BRISTOL - The United States Postal Service is being credited for detecting the ricin on the envelopes addressed to the President and Republican U.S. Senator from Mississippi, Roger Wicker. News 5 ...

Congressional officials confirmed that a letter addressed to Senator Roger Wicker tested positive for ricin, a potentially fatal natural toxin. According to the Associated Press, the envelope was ...

Ricin, contained in a package addressed to the White House, was intercepted by investigators on Saturday, the FBI said. The poison, found in castor beans, could “potentially be used as a biological ...

Add Yahoo as a preferred source to see more of our stories on Google. A Kissimmee man was sentenced after pleading guilty to making ricin, a biological toxin, in an attempt to kill his former business ...

The news that three envelopes intended for President Trump, Secretary of Defense James Mattis, and Chief of Naval Operations Adm. John Richardson triggered alarms in Washington yesterday. The ...

Ricin is one of the most toxic substances known to science with an LD 50 between 3 and 30 µg/kg in humans. Potentially lethal when inhaled, ingested, or injected, death can occur within 36 to 72 hours ...