Washington, D.C.

Feds Arrest Suspect in Capitol Mailings

Tests still being performed on letters

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Federal agents on Wednesday arrested a suspect in the mailing of letters to President Barack Obama and a U.S. senator that initially tested positive for the poison ricin.

The suspect was identified as Kenneth Curtis of Tupelo, Miss., federal officials told NBC News. They said he may appear in court as early as Wednesday night.

Both letters carried an identical closing statement, according to an FBI bulletin obtained by NBC News on Wednesday.