Fourteen people were arrested last Friday in raids in the Austrian capital of Vienna and the city of Graz.
Prosecutors said the coordinated action, which involved 800 officers, was part of an ongoing investigation into suspected membership in the terrorist organization ISIS.
Police also reportedly raided unofficial mosques where supporters of ISIS, against which the Trump administration has declared war, may have been meeting.
Among those arrested, at least four were from the Balkan country of Bosnia-Herzegovina, a former federal unit of Yugoslavia. They are suspected of being part of the so-called Bosnian Network, run by a preacher who received a 20-year sentence in July 2016 for recruiting young fighters for ISIS.
Austrian Islamists were in the process of drawing up plans to set up a caliphate in Austria, a massive raid conducted by over 800 Austrian police officers has revealed.
On Thursday morning around 800 Austrian police officers conducted a series of raids in the capital of Vienna and in Graz which saw 16 separate domestic premises searched, and led to the arrest of fourteen radical Islamists who are thought to be connected to the Islamic State terror group.
Police say that the raid was the result of a two-year long investigation into the radical Salafist network Die Presse reports.