San Francisco Chronicle Letter sent to US senator tests positive for deadly poision

By Kelly O'Donnell and Andrew Rafferty, NBC News. A letter intended to reach Sen. Roger Wicker, R-Miss., was intercepted at an off-site facility after testing positive for a deadly poison, according to FBI officials. Related United States Senate » Roger Wicker » Poisons » Reid: Letter with poison sent to Sen. Wicker - USA TodayUSA TODAY - by Gregory Korte Letter addressed to Mississippi senator may have contained ricinCBS News Highly Cited:Envelope tests positive for ricin at Washington mail facilityCNN>

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