1.   She has denied any links with the leftist group, but her advisers have expressed worries that her movement could be infiltrated by extremists.

2.   By the time of the Frankfurt arrests, German officials knew that the extremists had infiltrated Germany.

3.   Fischer claimed that right wing extremists have infiltrated the gun lobby.

4.   The Tutsi-dominated governments of Rwanda and Burundi have charged that Hutu extremists infiltrated their homelands from refugee camps in eastern Zaire.

5.   Libya has always denied the existence of any home-grown fundamentalist movement and says extremists have infiltrated the country from abroad.