21.  At least two pro-Pakistan Islamic extremist groups, Al-Mansooran and Jamiat-ul-Mujahiden, claimed responsibility.

22.  At the State Department, a spokesman said it was premature to determine clearly whether Ressam was a member of a known extremist group.

23.  Berlet, who is writing a book on the Web sites developed by fringe and extremist groups to promote their ideas and recruit members, agreed.

24.  Both Ms. Hammond and Arndt said that members of extremist groups were only a small minority of local residents, no more numerous than they were anywhere else.

25.  - Yasser Arafat, head of the new Palestinian Authority, outlawed the military wings of Hamas and other extremist groups in areas where Palestinians have self-rule.

26.  - The State Department issued a worldwide caution warning Americans they could still be in danger from extremist groups.

27.  A report on Israeli television said Arafat assured Peres he would act against extremist groups.

28.  Activists for Hamas, the extremist group that endorses terrorism and opposes the peace process, waved flags at the funeral.

29.  After months of scrutiny by the Democrats, the Anti-Defamation League and the press, this extremist group is desperate to remake its image.

30.  Buchanan County Drug Strike Force officials said they found no connection to any right-wing extremist groups.