MADRID, Spain - Spanish police say they've arrested 121 people in the country's biggest-ever crackdown on child pornography.

Authorities say they seized discs containing millions of video and photo files shared by a network that distributed them in 75 countries.

Police released a statement saying two of the suspects produced pornographic material themselves using members of their own families.

They say those arrested came from all kinds of backgrounds, including pilots, salespeople, porters, taxi drivers and bank employees.

Police say the arrests were made last week and four of those in custody are minors.

Brazilian police helped with the operation, which began in July 2007.