Since several of the attackers in the Brussels and Paris terrorist attacks had connections to the area, Belgian police started door-to-door checks in which a quarter of Molenbeek's inhabitants were investigated, a total of 22,668. This operation resulted in that of the 1,600 organisations investigated, 102 were found to be involved with crime and a further 52 were involved with terrorism. 72 individuals were found to have a terrorist connection and were subject to future surveillance.