French police have arrested a man in the Paris region as part of the investigation into the 13 November attacks in the city, sources say.
Some 2,700 raids have been conducted since the attacks, with 360 people placed under house arrest across France, the AFP news agency reports.
Police have also arrested two people in northern France suspected of supplying weapons to one of the gunmen in January attacks, reports say.
They were taken in for questioning.
The 29-year-old man arrested on Tuesday was planning to travel to Syria, according to one French media report.
The Paris prosecutor's office says the two people arrested in northern France were held on suspicion of helping to provide guns to Amedy Coulibaly, who attacked a kosher supermarket in January.
The prosecutor's office confirmed that the man arrested was Claude Hermant, who is known to have links to far-right groups, while the other is his partner.
Coulibaly killed four people inside the supermarket, and separately a policewoman, before dying in a shootout with police.