A spokeswoman for US Immigration and Customs Enforcement  confirmed the contents of a story of the report, but declined to provide a copy of the report.

The report says Islamic State has access to Syrian government passport printing machines and blank passports, raising the possibility the travel documents could be faked, citing a law enforcement source.

State Department spokesman John Kirby, asked at a briefing on  the report, replied: "We have been aware of reports, not just in the press, that they may have obtained this capability."  

FBI Director James Comey told a Senate committee hearing on Wednesday: "The intelligence community is concerned that they [Islamic State] have the ability, the capability to manufacture fraudulent passports, which is a concern in any setting."

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