LOS ANGELES (CN)—Federal agents on Tuesday raided 103 marijuana stores in Los Angeles County.

It was the latest skirmish in the federal war on medical marijuana, which is legal in California. The U.S. Attorney's Office called the targets "illegal marijuana stores."

"Out of the 103 storefronts targeted today, federal authorities sent warning letters to 28 stores in Long Beach, 71 in Los Angeles, and four in the Antelope Valley," the U.S. attorney said in a statement. "Two of the stores in Long Beach are housed in buildings that are the subject of asset forfeiture lawsuits that were filed today in United States District Court.