Four people, including a policewoman, have been detained over suspected links to the deadly attacks that brought terror to Paris in January.
One man taken into custody is said to have had ties to Amedy Coulibaly.
Coulibaly is suspected of killing a police officer and four more people at a kosher supermarket in the French capital.
The detained man’s girlfriend, a policewoman, is understood to also be in custody.
Coulibaly was shot dead by security forces. Apart from him and two other dead gunmen, no-one has been linked directly to the attacks at supermarket and the Charlie Hebdo satirical newspaper.
Twenty people, including the gunmen, died in the 7 to 9 January attacks.
Coulibaly’s widow left for Syria days before the violence.