According to Austrian police, the 27-year-old gunman was a member of extremist neo-Nazi group ‘Blood and Honour'.
The man fired more than 40 shots into the crowd of 150 attending a concert at a motorcycle club on the outskirts of Nenzing in the state of Vorarlberg, before running to a car park where he killed himself, The Local Austria reported.
The concert had been organized by the local motorbike club The Lords to celebrate its 30th anniversary, and the lone gunmen, whose identity was confirmed by police as Gregor S., had turned up with his new girlfriend.
According to police, he had been a member of Blood and Honour since he was 17, but people who knew him hoped that his new relationship, which included a baby with his girlfriend, had mellowed him.
However after arguing with her at the concert, he went home where his son was sleeping, grabbed the gun, and returned to the concert where he opened fire on other concertgoers at 3am.
Eyewitnesses said people who had escaped the bullets ran screaming into the nearby woods, while others ran onto the motorway and tried to flag down cars to get away. The injured and the dead were left behind on the ground.
A 48-year-old social worker and a 33-year-old member of the biker club died at the scene.
The injured included a 49-year-old Swiss woman and a 44-year-old man from Lichtenstein, about whom no further details have been released.
Police spokesman Susanne Dilp said: "Some of the 11 injured are still in a critical condition, although two have since been released from hospital."
In 2005 the neo-Nazi was banned from owning guns. A short while later he was convicted of GBH and of making threats. In 2012 he was committed to a psychiatric institute.
The far-right have been gaining in popularity in Austria of late. The country almost voted in a far-right president, Norbert Hofer, who was only narrowly defeated in Sunday's election.
Story courtesy of Central European News.