WASHINGTON (AP) -- U.S. Capitol police are investigating the discovery of at least two suspicious envelopes in Senate office buildings across the street from the Capitol.
The development comes on the day after a letter mailed to Sen. Roger Wicker of Mississippi was found in two preliminary tests to contain ricin, a potentially fatal poison. The letter was intercepted at an off-site facility where all mail to the Senate is screened.
It was not clear whether there was a connection between the letter and the two envelopes.
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