United States officials, speaking on condition of anonymity, told the National Broadcasting Company, Thursday, that attacks that have taken the lives of five Iranian nuclear scientists since 2007 are being carried out by an Iranian dissident group known as the People’s Mujahedin of Iran and that the group is financed, trained and armed by Israel’s Mossad intelligence agency.The officials said the Obama administration is aware of the  campaign but has no direct involvement.

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