U.S. prosecutors dropped charges against a Mississippi man accused of sending ricin-laced letters to President Barack Obama and a U.S. senator, according to a court order signed by a judge on Tuesday.

The decision came hours after Paul Kevin Curtis was released from a Mississippi jail on bond.

In a court order dismissing the charges, prosecutors said the "ongoing investigation has revealed new information" without providing any additional detail.

Curtis told a news conference afterward that he respected Obama and would never harm a public servant. "I love this country," he said.

The release of Curtis, 45, on bond came shortly after a judge indefinitely postponed a court hearing on his detention.