
Clément Meric was member of the Solidaires students' union and the far-Left anti-fascist movement.
Toulouse's Socialist mayor had expressed concern about a planned torchlit evening march to commemorate the victory of a Christian army in 721 over Muslims besieging the city, after a clash between ultra-Right and far-Left youths in Paris on Wednesday led to the death of a 19-year-old student.
Toulouse police headquarters said it had feared a "serious risk of public disorder" if the rally went ahead.
France has been shaken in recent months by scenes of far-Right youths hurling bricks at police and smashing cars as they piggybacked on street marches led by conservatives and Catholics against a reform to legalise same-sex marriage.
The sudden visibility of far-Right groups is shaking up the already fragmented Right-wing opposition, as National Front leader Marine Le Pen seeks to distance herself from them and the UMP conservative party squabbles over whether to embrace or oppose the anti-gay marriage movement.












Comment: While the world burns: Huge gay marriage protest turns violent in Paris