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Forensic experts collect evidence from a house in the Guildford area of Sydney on September 18, 2014. Australia's largest ever counter-terrorism raids detained 15 people and disrupted plans to "commit violent acts", including against random members of the public that reportedly involved a beheading on camera. AFP PHOTO / Saeed Khan        (Photo credit should read SAEED KHAN/AFP/Getty Images)
Forensic experts collect evidence from a house in the Guildford area of Sydney on September 18, 2014. Australia's largest ever counter-terrorism raids detained 15 people and disrupted plans to "commit violent acts", including against random members of the public that reportedly involved a beheading on camera. AFP PHOTO / Saeed Khan        (Photo credit should read SAEED KHAN/AFP/Getty Images)

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    Police: Random beheading plot thwarted

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Police: Random beheading plot thwarted

At least 15 suspects were detained in what Australian officials are calling the country's biggest anti-terror operation.

Police: Random beheading plot thwarted

At least 15 suspects were detained in what Australian officials are calling the country's biggest anti-terror operation.