Federal agents carried out a pre-dawn search of the Washington, D.C., home of Rep. Ilhan Omar on Monday as part of an ongoing federal criminal investigation involving her immigration history.

According to officials, Homeland Security Investigations executed a court-authorized search warrant obtained through the Department of Justice. A DOJ spokesperson confirmed the operation, describing it as part of an active federal investigation.

The probe is reportedly focused on immigration documents that were completed on Omar’s behalf when she was a child after arriving in the United States from Somalia.

The search marks a significant escalation in a case that first became public in September. Border security officials previously indicated that federal authorities were examining allegations involving Omar’s immigration records and other matters related to her path to U.S. citizenship.

Officials have also indicated that investigators are examining issues beyond Omar’s disputed 2009 marriage, which has long been the subject of public controversy and allegations. Omar has repeatedly faced claims that the marriage was arranged to assist a relative’s immigration status, allegations that have remained politically contentious for years.

Neither Homeland Security nor the Department of Justice has publicly announced any criminal charges against Omar. Officials have stated only that the investigation remains active.

Omar, a Democrat who represents Minnesota in Congress, has not publicly responded to the search at the time of publication.