One suspect lived in central Brussels, while the other lived in Molenbeek, a poor, immigrant neighborhood with links to previous attacks in France and elsewhere.
French Interior Minister Bernard Cazeneuve said on Sunday that the Paris attacks were planned in Belgium.
"Belgium and France are united in the fight against terrorism. The despicable attacks which hit us on Friday were prepared abroad, and a team of participants was mobilized on Belgian territory, which could have benefited, the investigation indicates, from help in France."
Seven suspects were arrested by Saturday evening. Two cars registered in Belgium were discovered in Paris after the attacks, both suspected of being used by the attackers. Both cars were rented in Brussels earlier last week.
Belgian Interior Minister Jan Jambon said Belgium is cooperating with France to uncover the network behind Friday's events.
"We spoke about the exchange of information between our services, which is taking place at a very high level. And in the forthcoming days we will bring together our police services and information services to again compare the different elements, and different information we have and to bring together all the information that we both have."
Officials say the gunman behind the killing at a Paris kosher grocery in January, after the Charlie Hedbo attack, acquired weapons in the neighborhood of Molenbeek. So did the man overpowered by a group of passengers in August on a Paris-bound train before anyone was killed.
Mafarma Sanogo lives near Molenbeek. She says the neighborhood's connection to terrorism has frightened her.
"It's frightening, but we don't have the choice. We can't remain locked in our homes. Yesterday I didn't want to go outside, I stayed inside my apartment. Today, I decided to go outside."
However, thirty-year-old Brussels-based barman Soufial Berrada has urged against jumping to stereotypes about the area.
"It's a multicultural area, but it's perhaps because police forces aren't doing their job as well. In my opinion, it's that. It's not an easy area, that's well-known. But we can't make generalisations," he said.
The Belgian government has told its citizens to avoid traveling to Paris unless absolutely necessary, while announcing additional security controls around the country.
For CRI, I'm Min Rui.
