All of them met in the centre of Cassaigne (Sidi Ali); and Belhamiti headed for half a group consisting of Mehantal, Belkuniene, Chouarfia, who were to position themselves slightly to the south and east of the gendarmerie buildings.

The other half-group under the leadership of Sahraoui Abdelkader and consisting of Belkonyne Taieb, Tehar Ahmed and Beldjilali Youssef was approaching the outer court of the gendarmerie from the West.

Belkonyne and Tehar, for fear of being surprised too, sought to hide behind the gendarmerie buildings; they found Saharaoui Abdelkader, who ordered them to stand ahead and to shoot the arrivals.

Laurent François collapsed, mortally shot in the back of the neck; Mendez Jean-François sank but was not hit by the bullet that would crash near a murderer in the gendarmerie wall.

On 1st November, a bomb exploded at the Sidi Ali cemetery, where a ceremony was held on the occasion of the outbreak of the war of national liberation, 5 children were killed and 17 were injured, two days later 36 people were arrested and then executed or burned by military security.