At least one of the raids is connected to the Paris attacks, according to the source, who is in contact with French and Belgian intelligence services. The other raids are connected to individuals known to Belgium intelligence, the source said. Some of the Paris attackers are also known to Belgium intelligence, the source added.

Also Saturday, CNN affiliate BFMTV reported that the father and a brother of one of the attackers had been taken into custody. And AFP reported that the two men were detained after police raided their homes 130 kilometers (81 miles) east of Paris. CNN has not independently verified that the men were picked up by authorities.

One of the suicide bombers in Friday's attacks has been identified as Ismael Omar Mostefai, according to a French member of Parliament. Mostefai lived in Chartres at least until 2012, said Jean-Pierre Gorges, who is mayor of the French town as well as a member of Parliament, via Facebook.

Man stopped at border

A man who rented a VW Polo used by terrorists at the Bataclan concert venue was intercepted at the border with Belgium, Paris prosecutor Francois Molins said. The man, who was driving a different vehicle when he was caught, is a French national living in Belgium and was accompanied by two other people, Molins said.

One of the terrorists who died in Paris was identified as a 30-year-old French national from Courcouronnes in the city's southern suburbs, Molins said Saturday.

That individual was involved in the attack on a concert hall, had a criminal history and was identified as having been radicalized in 2010, but that person had never been accused of terrorism, Molins said.

Molins said the attacker was identified by fingerprints.

In the nearly simultaneous attacks on Friday night, the assailants targeted six sites, the deadliest being a massacre at a concert hall where at least 80 people were killed.

In addition to the 129 people killed in Paris, 352 were injured, at least 99 seriously, Molins said Saturday. Seven terrorists were killed, French officials have said. They all had assault rifles, Molins added.

At least one American is among the 129 dead, officials said. The U.S. victim was Nohemi Gonzalez, 23, of El Monte, California, a junior studying design in Paris for a semester while enrolled at California State University, Long Beach, the school said.

Three Chileans also were killed, as were two people from Belgium, two from Mexico, two from Spain, one from Portugal, one from the United Kingdom and many French citizens. Other nations whose citizens were killed had yet to identify those victims.