One Nation leader Pauline Hanson has urged Australians to use the hashtag 'pray for a Muslim ban' in the wake of London's Westminster terror attack.

In a video posted to her Facebook page on Thursday, the Queensland senator took aim at London's first Muslim mayor, Sadiq Khan, for comments he made in September about terror attacks bring 'part and parcel of living in a big city'.

'People are feeling sorry for people over there and I've seen the hashtag #prayforlondon,' she said from Parliament House in Canberra.

'Well look, I have my own hashtag and you won't need to be praying for this place or that place, because it's #pray4amuslimban.

Scroll down for video

One Nation leader Pauline Hanson has urged Australians to use the hashtag 'pray for a Muslim ban' on social media in the wake of London's Westminster terror attack

'Well look, I have my own hashtag and you won't need to be praying for this place or that place, because it's #pray4amuslimban,' Ms Hanson said from Parliament House in Canberra

'That is how you solve the problem... put a ban on it'.

Ms Hanson called Mr Khan's comments 'amazing' and said she never wants to hear anything similar said in Australia.

Mr Khan's comments were not referencing Wednesday's attack and were made during an interview in September in response to the bombs that were detonated in New York City and Jersey.

'It's amazing that the Muslim mayor over there has come out and said 'oh well terrorist attacks are part and parcel of a big city''.' she said.

'Well they don't have to be, they never have been in the past and that's something I never want to hear or see in Australia from any mayor in any city'.

Ms Hanson (pictured in Senate on Thursday) said Mr Khan's comments were 'amazing' and said she never wants to hear anything similar said in Australia

In a video posted to her Facebook page on Thursday, the Queensland senator took aim at London's first Muslim mayor, Sadiq Khan

The video was made in response to Wednesday's attack where a man ploughed his Hyundai SUV into pedestrians on London's Westminster Bridge. Pictured, emergency services at the scene

In a video posted to her Facebook page on Thursday, the Queensland senator took aim at London's first Muslim mayor Sadiq Khan (pictured) for comments he made in September

Ms Hanson's criticism mirrors that of Donald Trump Jr who re-tweeted the six-month-old article with Mr Khan's comments on Thursday.

'You have to be kidding me?!' the son of the US President tweeted with the article.

The senator noted that she was broadcasting the video from Parliament House in Canberra where she was 'protected'.

'It's alright from here in Parliament House, they've done $16 million security,' she said.

'We're protected. what about you? Do you feel protected?'

The video was made in response to Wednesday's attack where a man ploughed his Hyundai SUV into pedestrians on London's Westminster Bridge.

Three people were killed on the bridge before the driver stabbed and killed an unarmed police officer. The driver was later shot dead by officers outside the House of Parliament.

Ms Hanson's criticism mirrors that of the son of the United States President, Donald Trump Jr

Foreign Minister Julie Bishop said Australia's High Commissioner in London had not identified any Australians among the killed or injured following the atrocity. Pictured, emergency services at the scene

An attacker brought carnage to central London on Wednesday afternoon, mowing down pedestrians on Westminster Bridge and hacking at police with knives in the grounds of the Houses of Parliament

Many Australian politicians expressed solidarity with London after the horrific attack, including Prime Minister Malcolm Turnbull, who offered his 'heartfelt sympathies'.

'Australia's heartfelt sympathy and resolute solidarity is with the people of the United Kingdom who we stand with today as we always have in freedom's cause,' he said.

Opposition leader Bill Shorten tweeted: 'This shocking crime, designed to weaken the U.K., will only make her stronger. All Australians stand with Britain today.'

The leader of the Katter's Australian Party, Bob Katter, used the opportunity to repeat his call for a visa ban on people from the countries between Greece and India and North Africa.

'Whist certainly not all people from the Middle East are like this, it is unfortunately true and real that all of these attacks are coming from people from these areas who have extreme ideologies,' he said in a media release.

'There should be no visa issued to anyone from these areas unless of course they are persecuted minorities – the Sikhs, Jews and Christians'.

One Nation leader Pauline Hanson tweeted: 'Our deepest sympathies are with the people of London & the victims of this evil terrorist attack,' before releasing the video on Thursday