State and federal agents Tuesday morning raided three Oklahoma City shops, shutting down what investigators described as a criminal enterprise involving the sale of millions of dollars of illegal synthetic marijuana and drug paraphernalia.

Agents raided two Mr. Coolz stores and a Coolz II store and arrested the four principal operators and two clerks, authorities said.

Attorney General Scott Pruitt said the “actions dismantled an organized criminal operation that was allegedly selling dangerous and illegal drugs to minors and making enormous profits in the process.”

“Synthetic marijuana is a harmful drug that has proven it contributes to criminal behavior in our society,” Pruitt said.