Out of the Netherlands' substantial Moroccan community also grew criminal gangs mostly involved in the trafficking of marihuana. This is due to the ties of some families to their area of origin, the Rif, which is a known hub of marihuana/hashish cultivating. Certain criminals have also progressed to the trafficking of cocaine. Armed robbery and prostitution are known activities of the Dutch Moroccan groups as well, called the Mocro Maffia.