"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.

A 21-year-old former student opened fire inside his school in Austria’s second-biggest city Tuesday morning and killed 10 people.

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.