91.   Jorge Molina told reporters that fliers attributed to an unknown group calling itself MRA had been found at the site of the explosion.

92.   Last month, a previously unknown group claiming to be affiliated to Saudi militant Osama bin Laden warned Americans and Britons to leave Yemen.

93.   Last week, an unknown group set off a firebomb outside the private offices of European Affairs Minister George Papandreou.

94.   Local and federal investigators said they were looking closer into a previously unknown group that claimed responsibility in a letter found near the synagogue.

95.   News organizations later received e-mails claiming responsibility for the kidnapping in the name of a previously unknown group.

96.   News organizations later received e-mails claiming responsibility for the kidnapping in the name of a previously unknown militant group.

97.   On Tuesday, however, the government television station reported that a heretofore unknown Muslim group, the Islamic Command Council, claimed responsibility.

98.   On Wednesday, another previously unknown group detonated a time-bomb in a Polytechnic bathroom to protest what it called the commercialization of the anniversary.

99.   Police also reported a telephone threat against all Vancouver abortion providers Wednesday by someone claiming to be with a previously unknown group called the Baby Liberation Army.

100.   Police said an unknown group called the Pacific Popular Front telephoned several media organizations and claimed responsibility for the attack.