A racist construction worker has been filmed ranting about his hatred of Muslims on a London train just days after terror attacks in mosques in New Zealand killed 50.

Footage of the man unleashing his expletive-laden diatribe about the attacks emerged as mourning massacre victims' families begin to bury their dead on the other side of the world.

Rush hour commuters were forced to listen to the man's rant about Muslims just days after a white supremacist slaughtered 50 worshippers in two mosques in Christchurch.

At one point, the high-vis jacket-clad worker says he "can't even get a train to work without even worrying a Muslim is going to blow me up".

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The footage is understood to have taken on an Overground train near West Croydon bound for London about 6pm yesterday.

In the footage, the man appears drunk.

As other commuters sit uncomfortably around him and some appear to walk away, the man, standing in the aisle, references the New Zealand terror attacks as he goes on a several-minute-long tirade.

He can be heard to swear at length, before saying: "Who do they think they are? Just kill them. Forty nine Muslims got killed the other day, and I was like 'come on mate you have to do that'."

In the footage he can be seen making offensive gestures, staggering slightly, and ranting about his British heritage and his military family.

"I can't stand Muslims" he can be heard saying, referring again to the Christchurch attacks.

"'Ragheads' I call them. I'm a racist."

Other passengers can be heard admonishing him, saying "that's wrong," and "no, there's no justification."

A passenger told the Mail Online the man had boarded the Overground train halfway to Canada Water.

The passenger said they thought he was joking at first because he was making such a fool of himself.

They claimed to have challenged him on his hate-filled views, telling him he could not "wish groups of people are dead."

"You can't walk around London saying those things. From the things he was saying on the train I think he is the sort of person who is capable of killing a Muslim," the passenger told the Mail.

"When people are drunk you get to understand their true nature. If he had a chance to kill a Muslim and get away with it he would."

The witnesses added that she and others feared intervening would lead to a fight.

But she added other passengers were uncomfortable and one man had got up and walked away before the man got off at Canada Water.

British Transport Police said of the London train footage: “British Transport Police are aware of a video on social media showing an incident of racial abuse on the London Overground.

"We take all reports very seriously and would ask anyone who witnessed what happened, or who has any information, to contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 800 of 19/03/19.”

(Image: Getty Images)

(Image: REUTERS)

The footage emerged as grieving Muslim families in New Zealand are beginning to bury their loved ones.

The nation remains in mourning after the sickening terror attack on two mosques in Christchurch killed 50 people.

The gunman in the attacks, New Zealand's deadliest mass shooting, had aired his white supremacist views in a manifesto and live-streamed the carnage on Facebook as he gunned down worshippers.

A 28-year-old Australian man has been charged with murder.

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New Zealand has moved swiftly to condemn the attack as the country rallies in support of the victims, survivors and their families.

Prime Minister Jacinda Ardern has vowed a swift gun control crackdown, put pressure on social media giants, and swore she would not speak the suspect's name.