Eleven people injured in a school shooting in Graz, Austria, on Tuesday are still being treated but are not in life-threatening condition, officials said.

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

Police have revealed chilling details about what they found in the home of a former student, 21, who is suspected of leaving a farewell message for his mom before killing 10 in the school shooting in Graz,

Austria has been left reeling after ten people were killed in the deadliest gun attack in its recent history, carried out in the gunman’s former school. Thousands of Austrians lit candles in a vigil for the victims in Graz on Tuesday evening.

Residents of Graz gathered for a mass and a candle lit vigil to mourn the 11 victims who were killed after a former pupil opened fire in a school. View on euronews

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.

The bishop of Graz-Seckau in Austria, Wilhelm Krautwaschl, expressed being “stunned and shaken” following a deadly shooting at a school in Graz that claimed 10 lives.

A 10th victim has died after a 21-year-old former student opened fire in a secondary school in Graz before killing himself.