French Prime Minister Manuel Valls says Friday's attacks by Islamist militants in Paris were organized from Syria.
He added that the authorities believed new terror attacks were being planned in France and other European countries.
Meanwhile two more attackers were named as well as five already identified.
One is confirmed to have entered Greece among migrants earlier this year.
A total of 129 people died in the attacks on bars and restaurants, a concert hall and the Stade de France.
A huge manhunt is under way for surviving members and accomplices of the Islamist group that carried out the attack.