San Francisco (CNN) — A federal judge has ordered half a dozen federal agencies to “immediately” reinstate probationary employees fired last month as part of the Trump administration’s effort to rapidly shrink the federal workforce, calling the effort a “sham.”

A judge has ordered the Trump administration to reinstate thousands of employees at federal agencies immediately. The probationary employees were fired last month as part of the administration’s effort to shrink the federal workforce rapidly.

The judge added that the scope of agencies covered under his ruling may expand or narrow, depending on further proceedings in the case.