Federal agents searched Representative Ilhan Omar’s home Monday morning as part of a criminal investigation, according to the department of justice and reports in the Associated Press and Fox News.

A video posted by Fox showed what appeared to be law enforcement in HSI jackets at what Fox News said was Omar’s Washington DC residence.

“Today in the Washington DC, 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 criminal investigation,” a DoJ spokesperson told the Guardian.

It was unclear what the nature of the warrant was. Omar’s office did not respond to a request for comment, and the White House and department of homeland security referred comment to DoJ. Citing two unnamed sources “close to the investigation,” Fox News reported that the search was related to a criminal fraud investigation concerning Omar’s immigration paperwork, which her late father filled out when she was a child.