By Afp     29 July 2017

Australian authorities said Sunday they had stopped an allegedly Islamist-inspired “terrorist plot” to bring down an airplane with an improvised explosive, after four people were arrested in raids in Sydney.
“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,” Australian Prime Minister Malcolm Turnbull told reporters.

Source https://www.dailymail.co.uk/wires/afp/article-4743084/Australia-disrupts-terror-plot-bring-airplane.html