Three U.S. government employee unions filed a lawsuit Monday against the Treasury, alleging that its sharing of confidential information with the Elon Musk-run Department of Government Efficiency violated the law.

An advocacy group and other unions are suing the Treasury Department after the Department of Government Efficiency gained access to its sensitive systems. The Alliance for Retired Americans, the American Federation of Government Employees,

Anonymous plaintiffs also called for a temporary restraining order Tuesday to prevent OPM from using a newly installed email system to mass-message federal employees.