A gunman has opened fire on a crowd at a concert organised by bikers in western Austria, killing two people and wounding 11.

The attacker then turned the gun on himself.

Police said the 27-year-old was believed to have been having an argument with a woman in a car park before the shooting at about 3.00am on Sunday.

The man became "enraged" and grabbed a "long" gun from his car before shooting "wildly into the crowd", Austrian public service TV station ORF.

He then went back into the car park and took his own life, police said. The woman is believed to have remained unharmed.

About 150 people were in the crowd at the time, it was reported.

Terrified concertgoers are said to have fled to nearby highways and woodland.

The shooting took place at around 3.00am local time in the grounds of an open air concert in Nenzing, about four miles (6km) east of the border with Liechtenstein.

The injured were taken to several hospitals across the state of Vorarlberg by ambulance.

Austrian news website Vorarlberg Online said the festival was organised by a motorcycle club called The Lords.

Police have launched an investigation.