Federal agents raided the home of US Representative Ilhan Omar under a sealed warrant, as part of an investigation focused on her decades-old immigration paperwork.
Possible crimes under investigation include conspiracy, false statements in immigration documents and immigration fraud, according to Reuters.
One source said a possible aim of the probe could be revoking her citizenship and deportation. No charges have been filed.
Omar denied any wrongdoing and called the raid "political intimidation."
The case raises significant questions about citizenship, legal process and political rights.