11.   The Mohajir Tiger Force is probably a cover name for extremists working for the MQM, police said.

12.   The Revolutionary Organization of Socialist Muslims, believed to be a cover name for the radical organization run by terrorist mastermind Abu Nidal, claimed responsibility.

13.   It is considered a cover name for the Ulster Volunteer Force.

14.   A Protestant paramilitary group Tuesday condemned death threats against Catholic teachers and postal workers in Northern Ireland issued by an organisation it has itself used as a cover name.

15.   Analysts believe a group called Direct Action Against Drugs, which has been linked to five of the killings, is a cover name for the IRA.

16.   The Red Hand Defenders is regarded as a cover name for two hardline loyalist groups, the Ulster Defence Association-Ulster Freedom Fighters and the Loyalist Volunteer Force.

17.   The Red Hand Defenders is regarded as a cover name for hardline loyalist groups, the Ulster Defence Association-Ulster Freedom Fighters and the Loyalist Volunteer Force.

18.   The three were members of the Lebanese Islamic Jihad, which no longer exists but was considered a cover name for clandestine operations by Hezbollah.