Australia has foiled an Islamist-inspired terrorist plot to bring down an aircraft with an improvised explosive device, authorities said Sunday, after four people were arrested in raids across Sydney. Prime Minister Malcolm Turnbull said the plot appeared to be "elaborate" rather than planned by a lone wolf, as security was strengthened at major domestic and international airports across the nation. "I can report last night that there has been a major joint counter-terrorism operation to disrupt a terrorist plot to bring down an airplane," Turnbull told reporters.



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