French far-right politician Marine Le Pen has deleted a picture she had published on her Twitter account of American journalist James Foley decapitated by the Islamic State, or ISIS, telling news agency Agence France-Presse she "didn't know" it was him. On Wednesday Le Pen posted three graphic pictures of executions by ISIS in response to French journalist Jean-Jacques Bourdin, who she said had drawn a parallel between her party the National Front - and the terrorist group.