"Toulouse: At least 3 people have been placed in custody after a raid conducted within the framework of the fight against terrorism," the i-Tele broadcaster tweeted.
France remains in a state of emergency, with reports saying that the emergency may not be lifted for three months.
#Toulouse > Au moins 3 personnes ont été placées en garde à vue après perquisition conduite dans le cadre de la lutte antiterroriste— iTELE (@itele) 16 ноября 2015
Other local media outlets reported several arrests made in the southeast city of Grenoble.
Anti-terror operations were conducted in the Paris suburb of Bobigny, the northern port town of Calais the town of Jeumont on the Belgian border, and other locations.
A search warrant has been issued for Salah Abdeslam, said to be one of the perpetrators of the attacks. The suspect is thought to be one of three brothers who rented a vehicle used to transport the gun-wielding suicide bombers in the late Friday attack on a concert hall in which the majority of victims were killed.
The Friday violence is being reported as the largest attack on the French capital since World War II.