A white supremacist shooter filmed himself gunning down dozens of worshippers at a mosque in New Zealand while streaming the massacre online.

Brenton Tarrant allegedly entered the Al Noor Mosque in Christchurch about 1.30pm on Friday during afternoon prayers and opened fire.

The horrifying 17-minute video streamed live on his Facebook shows the 28-year-old Australian firing more than 100 shots from multiple rifles at those inside.

Fifty people were killed and another 50 seriously injured during the rampage through two mosques.

Many were shot at point blank range in the building as they huddled together in corners while a woman was heard begging for help before he shot her in the head.

A white supremacist shooter filmed himself gunning down dozens of worshippers at a mosque in New Zealand while streaming the massacre online. At one point he stopped his car and aimed the camera at his face

The shooter's rampage began when he got into his car wearing military-style body armour and a helmet saying 'let's get this party started'

Tarrant's rampage began when he got into his car wearing military-style body armour and a helmet with a series of rifles on the passenger seat.

The weapons, including a semi-automatic shotgun he used, are scrawled with the names of past mass killers and cities where the shootings occurred.

After adjusting items of clothing, he says: 'Remember lads, subscribe to PewDiePie' and drives off with a sat nav giving him instructions on how to reach the mosque.

According to Bellingcat, the shooter listens to a folk song called 'Remove Kebab' - originally a propaganda video made by Serbian soldiers as a tribute to war criminal Radovan Karadžić.

Three minutes into the video, the attacker stops the car and directs the camera at himself and says 'hello lads' before he sets off again.

The first song stops and a military-style song starts but moments later the sat nav announces he has reached his destination.

As he drives up an alley, someone steps out in front of him and he calmly gives him the thumbs up and signals for him to cross the road.

He then parks up and opens his door before retrieving a gun from the boot of his car - one of at least six weapons in the vehicle.

After calmly walking to the entrance of the mosque, he sees an individual at the entrance and opens fire with nine quick shots.

Discarding that gun, he then produces another as he walks past a man sprawled out on the ground.

The gunman storms inside and fires quick bursts at anyone he can see. One wounded man tries to crawl away but is shot again.

After retrieving one of at least six assault rifles stored in his car, he walked up to the front door and began firing at the first person he saw

The shooter entered the Al Noor Mosque in Christchurch about 1.30pm on Friday during afternoon prayers and opened fire

The gunman stormed inside and fired quick bursts and anyone he saw. One wounded man tried to crawl away but was shot again

Amid scenes of unimaginable horror, the gunman turns right and sees a worshipper running for their life and opens fire again.

In the minutes that follow, he fires into people huddled in corners, sometimes not even looking where he is shooting, reloading numerous times.

When the sound of his gun stops between magazines, the moaning of wounded people can be heard until the shots begin again.

Several times he stands over wounded men, calmly reloading his gun, then shooting them multiple times to make sure they are dead.

At one point a man sprints towards him in a bid to flee to safety only to be gunned down as well.

Just over eight minutes in to the video, he sees a worshipper running towards the exit and opens fire again.

The shooter's weapons were marked with the names of other people who have carried out past attacks

A minute later, he exits the mosque before firing several rounds left and right along a pavement. Children's screams can be heard in the distance as he returns to his car to get what appears to be a scoped rifle.

He momentarily picks up a jerry can before deciding to leave it in the boot of his car.

The gunman returns to the grounds of the mosque and opens fire again, saying: 'We’re not going to get the badge today boys.'

He then runs back into the mosque past blood-soaked worshippers and once again starts shooting. At least two dozen people can be seen lying on the ground.

Seconds later, he moves closer and starts shooting individual worshippers in the head in an apparent effort to ensure they are dead.

He repeats this on the other side of the room, stopping to shoot another fallen victim in the head on the way.

Seemingly satisfied that everyone has been killed, the gunman sprints outside. Here, he shoots another person on the mosque's front lawn.

The woman stumbles on to the street and can be seen lying face down yelling 'help me, help me' as the shooter walks up to her.

Dozens of people have reportedly been killed at Al Noor Mosque (interior pictured)

A man was seen with bloodstains on his trousers near the mosque after the shooting

Tarrant calmly leans over her and shoots her twice in the head.

Returning to his car once more, just yards away from the body, he slams the car boot shut.

Fire by English rock band The Crazy World Of Arthur Brown can be heard blasting from the speakers. The singer bellows 'I am the god of hellfire!'.

Back in the car, and after apparently driving over the woman he had just killed, he laughs as he says the attack 'did not go as planned … f*****g Christ' before adjusting his sat nav.

Seconds later he stops to unleash shotgun rounds through his windscreen and then aims another shot through his window at a man on the pavement.

He then speeds off, waiting for two women to cross the road before sounding his horn and roaring across an interchange.

Analysing his slaughter, he says he was 'too quick, I should have stayed longer. There was time for the fuel.'

Witnesses reported hearing 50 shots and police are responding to the incident at Al Noor Mosque in Christchurch on the country's South Island

At least one gunman has opened fire at a mosque in New Zealand , shooting at children and reportedly killing dozens of people

He expressed regret for not 'burning that f*****g mosque to the ground'.

But, s**t happens,' he said. 'I left one full magazine back there, I know for sure, possibly more. I had to run along in the middle of the firefight and pick up the mags that fell and pretty much f**king instantly.

'There wasn't even time to aim there were so many targets. There were so many people, the car park was full, so there's no real chance of improvement.'

Moments later, the sound of a police car's siren can be heard as the music in the car gets louder and louder.

He continues to discuss the attack, noting, as he drives at high speeds, that 'the women weren't in yet I guess the men came in... earlier.'

As the video draws to a close, his car is held up in traffic. Through the shattered passenger window, he jokingly says 'hi' to the driver on his left.

The gunman posted a 73-page manifesto to Twitter before the killings, foreshadowing a 'terrorist attack'.

In the shooter's manifesto he mentions being inspired by other shooters including Anders Breivik who killed 77 people in Oslo, Norway in 2011.

He said he 'disliked' Muslims and hated those who had converted to the religion, calling them 'blood traitors'.

'I have read the writings of Dylan Roof and many others, but only really took true inspiration from Knight Justiciar Breivik,' he wrote.

Tarrant published an online manifesto detailing his plans to carry out a massacre hours before the attack

Detailing his plans for a massacre, the shooter wrote: 'To most of all 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.

'By the definition, then yes. It is a terrorist attack. But I believe it is a partisan action against an occupying force.'

The man said he initially planned to target a mosque in Dunedin, but changed to the Al Noor Mosque because it had 'far more invaders'.

He also claimed to be inspired by Candace Owens, an outspoken backer of United States president Donald Trump.

'The person that has influenced me above all was Candace Owens, each time she spoke I was stunned by her insights.'