Authorities in the United States say they are dropping charges against a man accused of sending letters containing poisonous ricin to the US President Barack Obama along with a senator.
Prosecutors say they uncovered new information and freed Paul Curtis from custody. Police are now searching the home of another Mississippi man.
Paul Curtis says he respects President Obama, loves his country and would never do anything to pose a threat to him or any other US official.
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He has asked his followers for help in tracking the man down.
The president said it was a “very sad day for journalism”.
A summit has been pencilled in for February following last year’s icebreaker in Singapore.