Police forces and town halls have been working with a Muslim group that promotes extremism, researchers say today.

Officials and volunteers with Muslim Engagement and Development (Mend) are claimed to have legitimised the killing of British troops and promoted conspiracy theories.

Mend has been championed by some MPs, universities, police forces, the Crown Prosecution Service and teachers. A report released today by the Henry Jackson Society, a Conservative think tank, entitled Mend: "Islamists Masquerading as Civil Libertarians", argues that public bodies should treat the group as an extremist organisation.

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