AZF is a terrorist[citation needed] group based in France.
The group attempted to extort money from the French government by threatening to place explosives along the nation's rail lines.
The French government placed ads in the newspaper Libération to contact the terrorists.
A week or so later another bomb was found on the TGV train tracks, but it was not armed and was different from the previous one.
In March 2004, a letter stated that they were temporarily stopping their operations due to logistical problems.