The White House is refusing to comment on the story in the Wall Street Journal that U.S. president Barack Obama wrote a letter to Iran's Supreme Leader Ayatollah Ali Khamenei.
According to the newspaper, the letter addressed the shared concerns about the rise of the Islamic State in Iraq and Syria and also touched on the continuing talks on Iran's nuclear programme.
While the Wall Street Journal says its the fourth letter between President Obama and Supreme Leader Khamenei, spokesman Josh Earnest refused to confirm anything.
IN: "I'm not in...
OUT: ...remains unchanged."
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