Separately, police have also arrested four people in an anti-terror probe in the town of Trappes west of Paris, the prosecutors' office said. It said those arrests were unrelated to the weapons probe, but gave no additional details.
Arrests in the weapons investigation started Monday, with more yesterday and today, the prosecutors' office said.
The arrests targeted people suspected of involvement in supplying weapons to Amedy Coulibaly, who killed four people in a hostage-taking at the Hypercacher market in eastern Paris and a policewoman in another incident before dying in a shootout with police.
The arrests come amid heightened security to protect the French presidential election ahead of the second round of voting May 7. A meeting of President Francois Hollande's national security council reviewed security plans today and the French leader asked for continued vigilance, a statement from the presidential palace said.
Disclaimer: No Business Standard Journalist was involved in creation of this content