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(NEWSER)– Fifteen people have been detained in Australia, and police there say that in so doing, they have thwarted a plot to carry out a random beheading in Sydney.

More than a dozen properties across Sydney were raided today by a force of 800 federal and state police officers, making it the largest such effort in Australian history, reports the AP. The raids came in response to intelligence that an ISIS group leader in the Middle East was calling on Australian supporters to kill, says Prime Minister Tony Abbott.

Reuters reports on the specifics of the alleged plot: Grab a person at random in Sydney, drape them in the black flag of ISIS, and kill them on camera.

Photo: Getty Images

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