Three Iraqi refugees were arrested Tuesday after illegally applying for citizenship, the Department of Justice announced.

Two of the refugees, Yousif Al Mashhandani, 35, of Vienna, Va., and Adil Hasan, 38, of Burke, Va., are biological brothers. Hasan’s wife Enas Ibrahim,32, was also arrested. The three refugees allegedly committed immigration fraud as they omitted the name of a terrorist relative on their refugee applications.

Yousif and Adil’s brother, Majid Al Mashhadani, was detained after he held an American citizen and other hostages for months in an underground bunker. When Yousif applied for citizenship in 2013, an FBI fingerprint analysis found a match on a document found at the underground bunker.

The applications the refugees filled out required them to detail family trees, and they all admitted to the FBI agents that they thought not including Majid would help them enter the U.S. The FBI also found that both Yousif and Adil had made up a kidnapping story involving a Shiite militia in order to claim persecution and admittance as refugees.

The affidavit also states that Adil’s wife Ibrahim is guilty of wire fraud as she lied on an application that she received no income in order to gain thousands in welfare. She and Adil also inflated their income on a loan application for a car.