The F.B.I. arrested a man suspected of sending ricin laced letters to Washington, D.C.
Paul Kevin Curtis of Corinth, Mississippi is accused of sending the letters to President Barack Obama and Mississippi Senator Roger Wicker.
Agents say Curtis also sent a third suspicious letter to a Mississippi justice official.
The letters to President Obama and Senator Wicker were intercepted at a mail screening facility in Maryland.
Initial tests indicated the deadly poison.
Wednesday morning Capitol police responded to suspicious envelope calls at two Senate buildings this morning.
They temporarily evacuated the first floor of one building.
Officers questioned a man with sealed envelopes in the area but he wasn’t taken into custody.