Investigators found darknet vendors allegedly running fake laboratories in their home to make fake pills that look like prescription pain pills, but instead are laced with fentanyl, methamphetamine and other illegal drugs, according to Deputy Attorney General Lisa Monaco.

Of the 150 arrested, 47 from Germany, 24 from the United Kingdom and others are from Australia, Italy, the Netherlands, France, Switzerland and Bulgaria.

The investigation has been ongoing for 10 months, between federal law enforcement officials in the U.S. and Europol in Europe. Investigators confiscated over $31.6 million in cash and virtual currency, 45 guns and a large collection of various illegal drugs, according to the Justice Department.

“Since the onset of the COVID-19 pandemic, more people have turned to the darknet than ever before to buy drugs,” Monaco said.

“Before I close, I want to address those who remain on the darknet, those who are peddling illegal drugs and thinking they are safe behind layers of digital anonymity. My message to you is simple: There is no dark internet. We can and we will shine a light.”

For more reporting from the Associated Press, see below.

The darknet is a part of the internet hosted within an encrypted network and accessible only through specialized anonymity-providing tools, most notably the Tor Browser.

Investigators also recovered a slew of illegal drugs, including counterfeit medication and opioid pills, along with more than 152 kilograms of amphetamine, 21 kilograms of cocaine and 32.5 kilograms of MDMA, according to prosecutors.

Prosecutors allege those charges are responsible for tens of thousands of illegal sales.

The operation was specifically designed to target “drug distributors who use the darknet to traffic these illicit drugs and items like pill presses, which are fueling the ongoing opioid crisis plaguing our communities,” Monaco said.

The Justice Department said its investigation was ongoing and investigators were still working to identify other individuals behind darknet accounts.

While the Justice Department has carried out similar investigations in the past, investigators were particularly concerned when they started seeing a surge in opioid sales on the darknet during the pandemic.