Hundreds of people demonstrated in Vienna against the advance of the terrorist group the Islamic State in Iraq and the Levant (ISIL) on the Syria-Turkey border town of Kobane.
They were protesting against the "inactivity of the West" and against the ISIL attacks on Kobane, which has a mostly Kurdish population.
According to a police spokesman, the demonstration was "completely peaceful".
The protest blocked traffic on the Ring, which encircles Vienna's historic centre, for several hours. It ended in front of the Parliament building around midnight.
There were similar, smaller demonstrations in the Austrian provincial capitals of Bregenz, Graz and Innsbruck.
Kobane, known in Arabic as Ayn al-Arab, has been the scene of heavy fighting for two weeks. According to international reports on Tuesday, ISIL captured three districts of the town, and was continuing street-to-street fighting with Syrian Kurd defenders.
Over 100,000 have already fled the town. According to the British Broadcasting Company (BBC), Kobane and the surrounding villages were home to around 400,000 people.