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Prime Minister David Cameron today outlined his plans to combat what he called the "poison" of home-grown extremism.
Foreign TV channels and websites which promote "warped ideology" will be targeted, while parents can get their childrens' passports removed if they fear they are being radicalised.
Blaming a "failure of integration", Mr Cameron said Britain must work to "de-glamorise" groups including the so-called Islamic State, and called on mainstream Muslim communities to support the campaign.
He also had a warning for those thinking of joining the extremist group - saying they would be used as little more than "cannon fodder".
ITV News deputy political editor Chris Ship reports:
Children are more likely to join Islamic State in Syria during the school holidays, the Education Secretary has suggested.
Nicky Morgan said the Government has issued guidance to schools and is working with "other authorities" to make sure young people do not disappear during this "difficult time of year".
Replying to shadow education secretary Tristram Hunt, who had asked what she and other ministers were doing to prevent children travelling to Syria during the summer, Ms Morgan said:
Her comments came after David Cameron announced plans to enable parents to apply to have their children's passports cancelled if they suspect them of planning to travel abroad to join a radical group.
Jamal Akbar from the Ahmadiyya Muslim Youth Association has welcomed the government's plans to tackle extremism.
However, he cautioned that inherently within the David Cameron's message "there’s still an undertone that there is a large group of Muslims in the UK that secretly support Isis. What evidence there is for that is to be seen".
But he added "any approach the government take to tackle extremism is welcomed in any community".
He also suggested that Muslim communities could also help the effort by speaking against Isis in their sermons "and give the youth the tools and the strength to fight against these radical ideologies which are totally against the teachings of Islam".
David Cameron has outlined plans to combat home-grown extremism which he said is "the struggle of our generation".
- A new Extremism Bill which will contain "narrowly-targeted" powers to target extremist "facilitators and cult leaders" whose aim is to "groom young people and brainwash their minds.
- The introduction of a scheme to enable parents to apply to have their children's passports removed if they suspect them of planning to travel abroad to join a radical group.
- Tackling sectarian and communal segregation in schools
- A new review to look into ways to boost opportunity and integration for minority groups.
The prime minister also called on Ofcom to clamp down on cable TV channels broadcasting extremist messages.
Universities should be ready to challenge extremist speakers on campus and broadcasters should use a wider range of speakers from Muslim communities, rather than repeatedly putting extreme voices on screen, he added.
David Cameron has said that parents worried their children have been influenced by extremism ideology and may travel to Syria or Iraq to join IS, can apply directly to get their passport cancelled to prevent travel.
Announcing the scheme in Birmingham as he outlined plans to combat extremism, the prime minister said: "Together in partnership let us protect our young people."
David Cameron is outlining plans to combat extremism and build a "stronger more cohesive society".
Speaking in Birmingham, he said: "I know what a profound contribution Muslims from all backgrounds and denominations are making in every sphere of our society. Proud to be both British and Muslim without conflict or contradiction."
"I know how much you hate the extremists seeking to divide our communities ... as Prime Minister I want to work with you to confront and defeat this poison", he added.
Prime Minister David Cameron delivers a speech in Birmingham on tackling home-grown extremism.
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Latest ITV News reports
Muslims in Luton, from where a family of 12 left to join IS militants, have expressed scepticism about the PM's counter-extremism plan.
David Cameron has outlined a five-year plan to tackle home-grown extremism which he said "was the struggle of our generation".