California Attorney General Rob Bonta led 20 states in a lawsuit on Tuesday alleging the Trump administration unlawfully shared public health insurance information with Immigration and Customs Enforcement officials.

The multistate lawsuit accused the Department of Health and Human Services of violating procedural and privacy laws by transferring residents’ personal Medicaid files to the Department of Homeland Security for ICE to use for immigration enforcement or “population surveillance.” The states are asking the U.S. District Court for the Northern District of California to block data transfers and order the “impoundment, disgorgement, and destruction of all copies of any Medicaid data containing personally identifiable, protected health information that has already been unlawfully disclosed.”