Ministers should have been told “within hours” that the deadly toxin ricin had been recovered from the home of the suspect in the Southport killings, counter terrorism and biological weapons ...

(CNN)-- Ricin, a poison thought to have been found in a Las Vegas, Nevada, hotel room Thursday, can be made from the waste left after processing castor beans, according to the Centers for Disease ...

On Wednesday evening, the FBI arrested a Mississippi man, Paul Kevin Curtis, on suspicion of sending letters filled with the poison ricin to Sen. Roger Wicker (R-Miss.), President Obama ...

Preliminary tests on a white powder discovered in a US Senate office building in Washington showed positive for the potentially deadly poison ricin. Two out of three tests indicate ricin ...

(CNN) -- Authorities doubt that the whitish-brown powder found in a roll of quarters at the University of Texas at Austin is ricin because no one has shown symptoms of exposure to the powerful ...

Police were last night hunting a lone assassin who slipped through their dragnet as they swooped on a London-based terrorist cell manufacturing the poison ricin. The man, probably the cell leader ...