A federal judge in Washington on Friday issued an order blocking the IRS from sharing taxpayer information with U.S. Immigration and Customs Enforcement, finding the practice is “unlawful.”

The court “concludes that the Plaintiffs have shown a substantial likelihood that the IRS’s adoption of the Address-Sharing Policy and the IRS’s subsequent sharing of taxpayer information with ICE were unlawful under the Administrative Procedure Act,” U.S. District Judge Colleen Kollar-Kotelly wrote in a 94-page ruling.