Los Angeles County District Attorney Steve Cooley said today that all the medical marijuana dispensaries in the county are operating illegally, and that "they are going to be prosecuted."

There are hundreds of dispensaries throughout the county, including as many as 800 in the city of Los Angeles, according to the city attorney's office. They operate under a 1996 voter initiative that allowed marijuana to be used for medicinal purposes, and a subsequent state law that provided for collective cultivation.

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