The evidence is that the 1995 Islamist attacks on the French metro were in fact carried out by the Algerian secret service

"This left the generals in an untenable position. In their desperation, and with the help of the DRS, they hatched a plot to prevent French politicians from ever again withdrawing support for the military junta. As Aggoun and Rivoire recount, French-based Algerian spies initially given the task of infiltrating Islamist networks were transformed into agent provocateurs. In spring 1995, Ali Touchent, an Algerian agent, began to gather and incite a network of disaffected young men from north African backgrounds to commit terrorist attacks in France. The DRS's infiltrators, led by Zitouni, also pushed the GIA to eliminate some of the FIS's leaders living in Europe."