U.S President Barack Obama has ordered some 350 additional military personnel to be sent to Iraq to protect American diplomatic staff in Baghdad.
The White House statement stresses that troops will not be serving a combat role on arrival.
The move follows the release of an Islamic State militant group video, which shows the apparent beheading of captured U.S. journalist Steven Sotloff.
Nina-Maria Potts reports from Erbil in northern Iraq.
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