The outlawed Islamist group al-Muhajiroun is openly recruiting near the home of the suicide bomber who blew himself up on a Stockholm street last week, The Sunday Telegraph can reveal.
MI5 and anti-terrorist police are attempting to unravel what transformed the father of three into an extremist.
But moderate Muslims in Luton, where Iraqi-born Taimour Abdulwahab lived for almost 10 years, claim the authorities are to blame for turning a blind eye to the activities of hard-core jihadi sympathisers.
Unimpeded by the police, the group, now calling itself The Reflect Project, is accused of mounting a campaign of intimidation and violence against those who disagree with it.
The group's members are followers of the radical cleric Omar Bakri Muhammad, who is being held in jail in Lebanon on terrorism charges, and are led locally by Ishtiaq Alamgir or Sword of Islam – a former inland revenue accountant.
Earlier this year, Mr Alamgir helped to organise a protest at a homecoming parade in Luton for troops who had served in Afghanistan. The demonstration ended in violence and arrests. Read more