The Austrian government plans to tighten national gun laws after enduring its worst school shooting, Chancellor Christian Stocker said in an interview broadcast on Saturday.

Speaking to ORF radio, Stocker said officials aimed to set stricter eligibility rules for possession and purchase of arms after a 21-year-old Austrian man on Tuesday shot dead ten people at a high school in the city of Graz before killing himself.

The planned measures would look at things such as age requirements and how to treat certain weapons, Stocker said in an excerpt of an interview due to air later in the day.

The cabinet plans to agree the measures on Wednesday, a spokesperson for the chancellor's office said.

The proposals include enhancing psychological expertise in schools, increasing police presence there, improving data exchange between authorities and tightening restrictions for individuals deemed to be a risk, newspaper Kronen Zeitung said.

The spokesperson confirmed the details.

Police described the shooter as an introvert and avid player of online shooting games who had largely withdrawn from the outside world before he planned the attack.

Authorities have yet to establish what moved him to carry out the shooting.