Koen Geens, the Belgian justice minister, said on Twitter that several arrests had been made in Brussels in connection with the Paris attacks.

He told VRT, a Belgian public broadcasting network, that a black rental car with Belgian plates was found near the Bataclan concert hall, where about 80 people were killed on Friday night.

On Saturday, the Belgian police carried out raids in the Molenbeek neighborhood of Brussels, near the Osseghem metro station, in an effort to find the person who had rented the car.

“There have been several arrests made in Molenbeek related to a car found in Paris that is linked to the attacks,” Sieghild Lacoere, a spokeswoman for the Belgian Ministry of Justice, said in a telephone interview. The car, she said, had been rented in Belgium.

It was not clear whether any of the attackers were Belgian citizens.