one person has been killed and several injured amid reports of a gun rampage and a suicide bomb attack near a synagogue in Vienna.
Gunshots were reported near Schwedenplatz, one of the main squares in the Austrian capital.
The attacker is said to have blown himself up with a suicide belt, Austrian newspaper reports.
Several people have been injured in the explosion, police have confirmed.
A police officer was also reportedly injured in the attack and is fighting for his life.
One of the alleged attackers has been arrested, according to the Austrian authorities.
However, it is believed that others could now be on the run.