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.
More top news
A study into the effects on LSD on the brain could aid the treatment of depression, the government's former drugs tsar has said.
Plumbers and heating engineers should be trained to help people living in homes that are too cold, according to new health guidelines.
Rain for the northwest, dry and cold elsewhere