They apparently planned to kidnap a civilian and behead them in the streets and drape the body in the ISIL flag.
http://www.cnn.com/2014/09/17/world/asia/australia-terror-arrests/index.html?hpt=hp_t1
CLIFFS: Bakala ya durka durka muhammad jihad
http://www.cnn.com/2014/09/17/world/asia/australia-terror-arrests/index.html?hpt=hp_t1
CLIFFS: Bakala ya durka durka muhammad jihad