The pre-dawn operation began around 6 a.m., with multiple agents wearing Homeland Security Investigations (HSI) jackets observed outside the residence. Two sources close to the investigation told Fox News that authorities are examining immigration documents completed by Omar's late father when she was a child.

The Department of Justice confirmed that federal agents had executed a search warrant.

"Today in the Washington, D.C., area, Homeland Security Investigations executed a judicially authorized search warrant secured by the Department of Justice. This enforcement action is part of an ongoing federal investigation," a DOJ spokesperson told Fox News Digital.

The DOJ has not publicly disclosed the specific allegations underlying the warrant.

The raid marks a significant escalation in a federal investigation that White House border czar Tom Homan publicly acknowledged last month - and revives longstanding questions surrounding Omar's immigration and marital history.

Homan Confirmed Criminal Investigation In September

As Jonathan Turley previously noted, Homan confirmed that federal authorities were examining allegations involving the Minnesota Democrat.

The controversy centers in part on longstanding claims that Omar married her brother, Ahmed Nur Said Elmi, to facilitate an immigration benefit - allegations Omar has repeatedly denied and which have not been established as fact.

Turley examined whether the allegations could support a fraud case or instead amounted to potentially defamatory accusations, and noted that the statute of limitations could complicate any prosecution involving events dating back many years.

In September, Omar told Fox News that DHS had not contacted her regarding the investigation.

"No, they have not," she said when asked whether federal authorities had reached out. At the time, Homan declined to disclose whether investigators possessed evidence of immigration or naturalization fraud.

Less than a month later, federal agents have now searched her Washington residence under a warrant obtained by the Justice Department.