The FBI has announced the arrest of a man suspected of sending letters that tested postive for potentially deadly ricin poison to President Barack Obama and a U.S. senator.
The FBI said the suspect was arrested April 17 in the southern state of Mississippi.
He was identified as a 45-year-old man from the town of Corinth, Mississippi.
Officials said the letters sent to Obama and Senator Roger Wicker, who represents Mississippi, were postmarked as being sent from Memphis, in Mississippi's neighboring state of Tennessee.
Both letters were detected as possibly being laced with ricin at screening facilities and were never sent on to the White House or Senate.
Officials said both letters contained the same cryptic written message.
The letters are undergoing more sophisticated tests to confirm the suspected presence of ricin.
Based on reports from AP and Reuters