Story highlights Australian leader said the terror plot was "advanced," but didn't elaboratePolice granted seven days by court to continue interrogating four suspectsSydney (CNN) Police raided at least five properties in Sydney, Australia, on Monday after four men were arrested over a plan to bring down an airplane as part of a complex terror plot. One local resident told CNN he had never seen anything like it in his neighborhood. Police search for evidence at a block of flats in the Sydney suburb of Lakemba on July 31. While Australian media was abuzz with theories around the type of the terror device, Australian Federal Police (AFP) commissioner Andrew Colvin said there were no official details as yet. "The plot that we are investigating we believe was an attempt to put a device onto an aircraft, but beyond that the speculation is just that -- it's speculation," Colvin told a press conference Monday.

Source: CNN July 31, 2017 07:18 UTC