Department of Justice (DOJ) investigators filed a lawsuit today against the University of California, San Diego (UCSD) Medical Center, saying that the center made “excessive demands” that recently hired, non-citizen employees verify that they were authorized to work in the United States.

“[T]he medical center engaged in a pattern or practice of subjecting newly hired non-U.S. citizens to excessive demands for documents issued by the Department of Homeland Security in order to verify and re-verify their employment eligibility,” DOJ said in a statement, “but did not require U.S. citizens to show any specific documentation.”