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The former Ukip leader challenged the assertions of Prime Minister Theresa May and London Mayor Sadiq Khan that Britain stands united in the face of the London terror attack, insisting that the people in fact want "answers" about what they are going to do. Nigel Farage said that the attack bolstered President Donald Trump's case for tougher vetting of migrants from some Muslim nations, claiming that countries which open their door to immigration from the Middle East are "inviting in terrorism". Speaking on US TV network Fox News, the Ukip MEP said: "The idea that this whole country is united, which is what we are hearing from our leaders, I'm not sure is true.

GETTY/EPA Nigel Farage has said the London terror attack was because of 'failed multicuralism'

The problem with multiculturalism is that it leads to divided communities Nigel Farage

"I think the British people want some answers from our leaders as to what they are now going to do." And he added: "I do actually think that the moment has come for us to actually point the blame. What these politicians have done in the space of just 15 years may well affect the way we live in this country over the next 100 years." Discussing the causes of Wednesday's attack with presenter Sean Hannity, Mr Farage - himself a commentator on the channel - said: "We've made some terrible mistakes in this country, and it really started with the election of Tony Blair back in 1997, who said he wanted to build a multicultural Britain.

AFP A man ploughed through the crowd on Westminster Bridge and then stabbed a policeman

PA PC Keith Palmer was killed during the London terror attack

"His government even said they sent out search parties to find immigrants from all over the world to come into Britain. Do you know what? I don't think we vetted a single one of them. "The problem with multiculturalism is that it leads to divided communities. It's quite different to multi-racialism. That's fine, that can work very happily and extremely well. But we've finished up with very divided communities.

London Terror Attack: Politicians react Thu, March 23, 2017 Politicians from around the world have responded to the London terror attack which led to the death of 4 people and more than 40 injured Play slideshow GETTY/REUTERS/TWITTER 1 of 12 At least four people have been killed including a policeman