Baku-APA. The US capital was on high alert Wednesday after law enforcement authorities said a letter sent to US President Barack Obama has preliminarily tested positive for the deadly poison ricin and that suspicious packages had been removed from the US Senate, APA reports quoting RIA Novosti.
The letter to Obama was intercepted by the US Secret Service at an off-site White House mail facility Tuesday and contained “a granular substance that preliminarily tested positive for ricin,” the US Federal Bureau of Investigation (FBI) said in a statement.
White House spokesman Jay Carney told a news conference Wednesday that Obama had been briefed on the development.
The announcements came a day after officials said a letter to US Sen. Roger Wicker, a Republican from Mississippi, had tested positive for ricin as well and rattled a country already on edge after the deadly blasts at the Boston Marathon on Monday that killed three people and wounded 183 others.