The FBI executed four search warrants on suspected drug labs in Southern California this week, including busting one location in Orange County that was “one of the largest labs” federal agents have ever seen in the region, according to authorities.

Federal agents discovered more than 2,000 kilograms of “pill product” at the drug lab in Garden Grove that could be made into illegal drugs, said Laura Eimiller, a spokeswoman for the FBI’s Los Angeles field office. They also found what they believe to be counterfeit Xanax pills, methamphetamine and bath salts, she said.

Eimiller said that the DEA agents and experts said it was “one of the largest labs they’ve ever seen.”