41.   The subsequent story was an embarrassment for El Al, long famed for its stringent security measures.

42.   U.S. officials say stringent security is needed because some captives have threatened to kill their American guards.

43.   U.S. officials have said stringent security is needed because many of the prisoners are dangerous and some have threatened to kill their U.S. captors.

44.   U.S. officials say they are treating the prisoners humanely and that stringent security is needed because some captives have threatened to kill their American guards.

45.   He promised that any which failed stringent security checks would be withdrawn.

46.   And all lower calibre handguns would be available for use only at licensed clubs under conditions of stringent security.

47.   As stringent security measures went into force across France, Interior Minister Jean-Louis Debre emphasised that as yet there were no firm leads.

48.   Authorities in Islamabad have also banned pillion riding on motorbikes under stringent new security measures enforced in the city, local government officials and police said.

49.   Candidates for work permits must pass stringent security checks, the spokesman said.

50.   Critics say that blast should have unleashed more stringent security measures for all US military personnel.