Washington: The FBI on Saturday arrested a man on charges of allegedly sending poisonous ricin-laced letter to US President Barack Obama and other leaders.
The individual identified as Everett Dutschke, 41, was arrested from his Mississippi home, the FBI said.
This is the second arrest in the case after investigating authorities withdrew their case against Paul Kevin Curtis earlier this week.
Curtis had been arrested on April 19 on suspicion of being the sender of these letters.
Besides Obama, the alleged ricin-laced letters were also sent to Republican Senator Roger Wicker of Mississippi and a Mississippi judge Sadie Holland.
This delivery of poisonous letters in the immediate aftermath of Boston bombings had created widespread anxiety.
Neither the US President nor the Senator were in danger at any point. All letters addressed to the White House and Congress are received at a far away off-site facility where they are scanned for any suspicious objects or substances before being cleared for dispatch to their destination.