Within minutes of waging terror on two mosques in Christchurch and killing 49 innocent people, the whole world knew Brenton Harrison Tarrant’s name.

The Australian terrorist live streamed on Facebook his horrific massacres at Al Noor Mosque in the city’s centre and Masjid mosque in the suburb of Linwood.

In Australia, in the northern New South Wales town of Grafton, his horrified family watched on in shock.

It’s been revealed today that Tarrant’s family called Australian authorities after seeing news reports and offered their assistance with investigations.

NSW Police Commissioner Mick Fuller said the killer had not spent significant time in Australia over the past four years.

When he was here, he was not known to police — except for some minor traffic infringements.

He is currently charged with just one count of murder but is expected to face further charges as investigations continue.

In a vile 73-page manifesto posted online, he described himself as “just a regular White man”.

The 28-year-old noted he was born “to a working class, low-income family … who decided to take a stand to ensure a future for my people”.

Christchurch continues to reel from his acts, which have sparked an enormous police response right across the country.

More details are emerging about the background of the gunman, who said he carried out the attack to “directly reduce immigration rates to European lands”.

Sky News heard that the town of Grafton is in shock, trying to come to terms with how a “polite, well-mannered young man” came to find himself on a path that led to Christchurch.

He was a student at the local high school and went on to work at a gym, where his former boss said he regularly volunteered his time to train kids for free.

In April 2010, his father died suddenly of cancer aged 49, leading Tarrant to set off on a seven-year trip around the world.

It was at some time during this journey that former friends now speculate he was “perhaps radicalised”.

Family members who remain in the Grafton area are in shock and trying to come to terms with his acts, and are assisting police with their investigations, Sky News said.

The header photo on Tarrant’s Twitter account shows a victim of the 2016 Bastille Day terror attack in Nice.

The famous photo by Reuters photographer Eric Gaillard came to symbolise the Bastille Day massacre when 84 people were killed by a truck ploughing into holidaying crowds, Reuters says.

He described his reasons for the disgusting attack as to “show the invaders that our lands will never be their lands, our homelands are our own and that, as long as a white man still lives, they will NEVER conquer our lands and they will never replace our people”.

Tarrant revealed he had been planning an attack for up to two years, noting he decided on Christchurch three months ago.

He said New Zealand was not the “original choice for attack”, but described it as “target rich of an environment as anywhere else in the West”.

“An attack in New Zealand would bring to attention the truth of the assault on our civilisation, that no where (sic) in the world was safe, the invaders were in all of our lands, even in the remotest areas of the world and that there was no where (sic) left to go that was safe and free from mass immigration.”

#BREAKING: Man who identified himself as Brenton Tarrant uploaded lengthy manifesto online before carrying out Christchurch, New Zealand shooting rampage https://t.co/3dwagifAuO pic.twitter.com/k4IIIa2Umy — Matthew Keys (@MatthewKeysLive) March 15, 2019

Claiming to represent “millions of European and other ethno-nationalist peoples”, he said “we must ensure the existence of our people, and a future for white children”.

The gunman described the attack as an act of “revenge on the invaders for the hundreds of thousands of death caused by foreign invaders in European lands throughout history … for the enslavement of millions of Europeans taken from their lands by the Islamic slavers … (and) for the thousands of European lives lost to terror attacks throughout European lands.”

He also said it was to take revenge for Ebba Akerlund, the 11-year-old child who was killed in a 2017 terror attack in Stockholm.

Further down in the manifesto, Tarrant described the Stockholm attack as the “first event” that inspired him to commit the attack, particularly the death of the 11-year-old girl.

Speaking on television in Sweden today, Ebba’s mother condemned the terrorist attack and the Australian’s brutal crimes.

The massacre “goes against everything Ebba stood for,” Jeanette Akerlund told public broadcaster SVT.

He said the attack was also inspired by a trip he took to France in 2017.

“For many years I had been hearing and reading of the invasion of France by non-whites, many of these rumours and stories I believed to be exaggerations, created to push a political narrative.

“But once I arrived in France, I found the stories not only be true, but profoundly understated. In every French city, in every French town the invaders were there.”

Earlier in the manifesto, Tarrant described his childhood as “regular” and “without any great issues”, noting he had little interest in his education and “barely achieved a passing grade” at school. He said he earned money investing in Bitconnect, an open-source cryptocurrency.

Tarrant said he feels no remorse for the attack. “I only wish I could have killed more invaders, and more traitors as well.” He also said there “was a racial component to the attack” and described it as “anti-immigration” and “an attack in the name of diversity”.

Posting on an 8chan forum, a user who identified himself as Tarrant announced he would carry out the attack.

“I will carry out and attack against the invaders, and will even live stream the attack via facebook,” he wrote, with a link to his Facebook page. “If I don’t survive the attack, goodbye, godbless and I will see you all in Valhalla!”

Many anonymous users responded praising him for the attack, with comments like “Godspeed” and “that video is so goddamn good”.

In the days leading up to the attack, Tarrant posted photos to his now-suspended Twitter account of what appears to be guns, ammunition and a military-style vest.

The weaponry is scrawled with references to ancient battles and more recent attacks against Muslims.

In one image he writes “For Rotherham, Alexandre Bissonnette, Luca Traini”.

Bissonnette was sentenced to 40 years for shooting six people dead in the 2017 shooting at a mosque in Quebec.

Traini, an Italian man, is serving 12 years in prison for the shooting of six African migrants in a racially motivated attack in October last year.

On what appears to be a gun, the message “Here’s your migration compact!” is written.