Austria has declared three days of national mourning following what appears to be the deadliest attack in its post-World War II history.

"I think the first thing is shock, to be honest. I think you can't react the other way. I think everyone in the school is in complete shock," said 24-year-old student Helene Parr, who knows people at the BORG Dreierschützengasse school, where the mass shooting took place.

With Austria still reeling from this week's deadly school shooting that killed 10 people, a debate is now raging over the Alpine country's gun laws.

ISLAMABAD: Pakistan has expressed deep sorrow over the tragic shooting at a school in Austrian city of Graz. “We are deeply saddened by the tragic shooting at the secondary school in Graz, Austria, that has resulted in several casualties with many injured,” the Foreign Office spokesperson said.

King Charles and Queen Camilla have sent an emotional message to Austria following the shooting rampage in Graz.

A 21-year-old man, Arthur A., committed Austria's deadliest school shooting in Graz, killing 10 before turning the gun on himself. Investigations reveal his introverted nature and obsession with online shooting games.

The King and Queen have shared an emotional statement to the victims and families affected by the school shooting in Austria that has claimed the lives of 11 people