A shooter who launched a murderous rampage at a school in Austria has been identified by police as a drop-out former student.

The 21-year-old suspect opened fire on students and staff at the BORG Dreierschuetzengasse high school in Graz, killing 10 and injuring 28.

Armed with a shotgun and pistol, the attacker burst into two classrooms and shot in circles to inflict maximum damage, according to reports.

The massacre only ended when the gunman, who local media said had been the victim of bullying during his time at the school, shot himself dead in a toilet.

Police confirmed that he entered the premises with two weapons and said he had a licence for both.

The man, who has not yet been named by authorities, was not previously known to police.

A father of two students at the school described to local media how one of his sons had been in a classroom where the attacker opened fire.

To avoid being shot, the teenager lay on the floor and pretended to be dead, his father told PULS 24 News.

The mother of another pupil who survived the massacre told how he called her from inside the school as the killing unfolded.

‘My son called me to say he was in school and that he was being shot and that he thought he was going to die,’ she said. ‘I’ve only found out now, two hours later, that he’s still alive.’

Family members reunite following a deadly school shooting in Graz, Austria

Family members reunite following a deadly school shooting in Graz, Austria

Terror-stricken pupils run down a corridor and a flight of stairs as they are escorted out of the building by heavily armed police

Terror-stricken pupils run down a corridor and a flight of stairs as they are escorted out of the building by heavily armed police

An armed police officer is seen scouring the school's corridors in an attempt to evacuate students

A chilling video circulating online shows the moment gunshots rang out around the BORG Dreierschuetzengasse high school

Interior minister Gerhard Karner confirmed the shooter was a former pupil who didn’t finish school, adding that ‘anything else is still speculation’.

Austrian Chancellor Christian Stocker declared three days of national mourning in the wake of the bloody attack, saying that it marked ‘a dark day in the history of our country’.

Horrifying footage shows how gunshots rang out through the school as students desperately tried to hide.

Terror-stricken pupils filmed the moment they fled their classrooms, running through the hallways as heavily armed cops descended on the building.

Another disturbing video shows victims lined up on stretchers while dozens of paramedics tend to them. Some are covered by white sheets. 

In a separate video, an injured patient lying motionless on a stretcher can be seen being carried into a helicopter by paramedics.

The school remains closed until further notice. 

Special forces descended on the high school shortly before 10am local time after reports of gunshots. 

Police confirmed that the campus had been safely evacuated and that there was no further danger. 

Some 158 paramedics were at the scene along with 31 crisis intervention staff and 65 emergency vehicles. 

Students who managed to escape the violent rampage were reunited with their parents, while those injured were taken to nearby Helmut List hall – an events venue close to the school – to receive treatment. 

A disaster alert was in place today in local hospitals.

Police evacuated the building this morning and deployed their specialist Cobra tactical unit, which handles attacks and hostage situations. 

Those injured are said to be receiving treatment in the Helmut List hall

Special forces descended on the high school shortly before 10am local time after reports of gunshots

The gunman entered the premises with a handgun and a pistol, according to local reports

The gunman entered the premises with a handgun and a pistol, according to local reports

Two female students cling on to each other as they escape the school building

Two female students cling on to each other as they escape the school building

Police confirmed that the campus had been safely evacuated and that there was no further danger

Police confirmed that the campus had been safely evacuated and that there was no further danger 

The suspect has been described by local media as a 21-year-old former student who had been a victim of bullying at the school

The suspect has been described by local media as a 21-year-old former student who had been a victim of bullying at the school

Graz mayor Elke Kahr called the incident 'a terrible tragedy'

Graz mayor Elke Kahr called the incident ‘a terrible tragedy’

The suspect is said to have opened fire in two classrooms

One clip shows a helicopter flying over the area

One clip shows a helicopter flying over the area

The shooting has been described as the worst mass killing in Austria

The Austrian government has also reacted to the shooting, with Chancellor Christian Stocker cancelling his appointments for the day

The Austrian government has also reacted to the shooting, with Chancellor Christian Stocker cancelling his appointments for the day

The suspect is among the dead, having reportedly killed himself in the toilet after opening fire on two classrooms

The suspect is among the dead, having reportedly killed himself in the toilet after opening fire on two classrooms

Newspaper Krone spoke to a teacher at the school who described being barricaded inside a classroom with students after hearing gunshots. 

The Austrian government has also reacted to the shooting, with Chancellor Christian Stocker cancelling his appointments for the day. 

Commenting on the tragedy, he said: ‘The school shooting in Graz is a national tragedy that has deeply shaken our entire country. 

‘This incomprehensible act suddenly tore young people from the lives they still had ahead of them.’

‘What happened today affects us all – as people, as parents, as a society.

‘A school is a place of trust, security, and hope.’

The interior and education ministers are understood to be on their way to Graz.

Graz Mayor Elke Kahr called the incident ‘a terrible tragedy’. 

‘All emergency organisations are acting with caution. 

‘Some of the children and teachers have since been taken to the Helmut List Hall in Graz. Family reunifications are taking place in the ASKO Hall. Crisis intervention team members are on duty,’ she added. 

EU top diplomat Kaja Kallas declared herself ‘deeply shocked’ by reports of the shooting.

‘Every child should feel safe at school and be able to learn free from fear and violence,’ she posted on X. 

Other images and videos circulating on social media show paramedics and police arriving at the scene

Other images and videos circulating on social media show paramedics and police arriving at the scene

The interior and education ministers are understood to be on their way to Graz

The interior and education ministers are understood to be on their way to Graz

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‘My thoughts are with the victims, their families and the Austrian people in this dark moment.’

School shootings are much more rare in Europe than in the United States but in recent years Europe has been shaken by attacks at schools and universities, that were not connected to terrorism. 

Graz is the second largest city in Austria and is located in the southeast of the country.

The shooting occurred shortly before the tenth anniversary of the Graz car attack on June 20, 2015 that left three people dead and which many Graz residents still remember today. 

Attacks in public are rare in the Alpine nation of almost 9.2million people. It ranks among the ten safest countries in the world, according to the Global Peace Index. 

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