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Police at the scene of overnight terror raids in Surry Hills on July 30, 2017 in Sydney, Australia. Counter terrorism police raided four houses across Sydney on Saturday night and arrested four men over an alleged terror plot that involved blowing up an aircraft. Australian travelers have been warned to expect major delays at airports around the country with security screening measures ramped up following the raids.
Police at the scene of overnight terror raids in Surry Hills on July 30, 2017 in Sydney, Australia. Counter terrorism police raided four houses across Sydney on Saturday night and arrested four men over an alleged terror plot that involved blowing up an aircraft. Australian travelers have been warned to expect major delays at airports around the country with security screening measures ramped up following the raids.

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Police: Terror plotters had 'functioning' bomb

Police are releasing new details on two thwarted terror plots in Australia, one involving the bombing of a passenger plane and the other a potential poison gas attack. CNN's Anna Coren has more.

Police: Terror plotters had 'functioning' bomb

Police are releasing new details on two thwarted terror plots in Australia, one involving the bombing of a passenger plane and the other a potential poison gas attack. CNN's Anna Coren has more.