The Iraqi Prime Minister claims that his country's intelligence agencies have uncovered a plot to attack underground systems in New York and Paris.
He was speaking in New York where he's attending the UN General Assembly.
Haider al-Abadi says foreign fighters in the Islamic State militant group have been planning an attack which could take place 'imminently'.
However, US officials say they had seen no evidence of such a threat before Mr al-Abadi's comments.
US correspondent Simon Marks says the Prime Minister's claims go into some detail.
IN: "He told….
OUT: ...threat."
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US correspondent Simon Marks says the Prime Minister's claims are being greeted with some scepticism.
IN: "Haider al….
OUT: ...assembly."
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US correspondent Simon Marks says the Prime Minister's claims describe a nightmare scenario for western governments.
IN: "I think….
OUT: ...mayhem."
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