Federal authorities have searched more than 40 homes across Texas as part of an operation targeting a network that allegedly helped North Korean information technology workers obtain remote jobs at American companies using stolen or fabricated identities.

The FBI seized 187 laptops and other devices during Operation Lonestar Roundup, announced Tuesday by the U.S. Attorney’s Office for the Northern District of Texas. Approximately 100 devices were recovered in North Texas.

Investigators say the homes served as “laptop farms,” where U.S.-based facilitators received computers from companies that believed they had hired American workers. The facilitators configured the devices and installed software that allowed North Korean operatives overseas to access the computers remotely and perform their jobs.

The workers allegedly used stolen or fabricated identity documents to secure employment, along with virtual private networks and other tools to conceal their actual locations. According to prosecutors, U.S.-based helpers then transferred the workers’ earnings to accounts controlled by North Korea.

FBI Dallas Special Agent in Charge R. Joseph Rothrock said the investigation targeted activity supporting North Korea’s weapons of mass destruction, ballistic missile, intelligence, and nuclear programs. He noted that each seized laptop could represent a company that unknowingly employed a North Korean IT worker.

Cybersecurity firm CrowdStrike has identified the workers and their facilitators as “Famous Chollima,” a name also used by victims to describe the broader network. Prosecutors said the operatives also used fraudulent Google accounts to carry out the scheme.