Police have found the hideout where they believe Amedy Coulibaly – the gunman suspected of killing a police officer and then four other people last week in Paris – prepared for his attacks, local authorities told ABC News.

Coulibaly rented an apartment in the Paris suburb a week before the attacks, according to the mayor’s office in Gentilly.

Authorities raided that apartment Sunday, according to France’s RTL Radio, locating a stash of weapons and ISIS flags.