Dr. Rasha Alawieh had also told agents that while in Lebanon she attended the funeral last month of Hezbollah's slain leader Hassan Nasrallah, whom she supported from a "religious perspective" as a Shi'ite Muslim.

The U.S. Department of Justice provided those details as it sought to assure a federal judge in Boston that U.S. Customs and Border Protection did not willfully disobey an order he issued on Friday that should have halted Alawieh's immediate removal.

The 34-year-old Lebanese citizen, who held an H-1B visa, was detained on Thursday at Logan International Airport in Boston after returning from a trip to Lebanon to see family. Her cousin then filed a lawsuit seeking to halt her deportation.

In its first public explanation for her removal, the Justice Department said Alawieh, a kidney specialist and assistant professor at Brown University, was denied re-entry to the United States based on what CBP found on her phone and statements she made during an airport interview.

"It's a purely religious thing," she said about the funeral, according to a transcript of that interview reviewed by Reuters. "He's a very big figure in our community. For me it's not political."

Western governments including the United States designate Hezbollah a terrorist group. The Lebanese militant group is part of the "Axis of Resistance", an alliance of Iran-backed groups across the Middle East that also includes the Palestinian Islamist movement Hamas, which sparked the Gaza war by attacking Israel almost a year ago on Oct. 7.

Based on those statements and the discovery of photos on her phone of Nasrallah and Ayatollah Ali Khamenei, the supreme leader of Iran, the Justice Department said CBP concluded "her true intentions in the United States could not be determined."

Alawieh and a lawyer for her cousin did not immediately respond to requests for comment.

In Monday's filing, the Justice Department also defended CBP officials against claims by the cousin's legal team that Alawieh was flown out of the country on Friday evening in violation of an order issued by U.S. District Judge Leo Sorokin that day.

The judge had issued an order barring Alawieh's removal from Massachusetts without 48 hours' notice. Yet she was put onto a flight to France that night and is now back in Lebanon.

The judge on Sunday had directed the government to address "serious allegations" that his order was willfully violated ahead of a hearing that had been scheduled for Monday.

That hearing was canceled on Monday at the request of the cousin's lone remaining attorney, after lawyers at the law firm Arnold & Porter Kaye Scholer representing her pro bono withdrew, citing "further diligence" about the quickly-moving case.

A lawyer with that firm said she had gone to the airport on Friday and shown a CBP officer a copy of Sorokin's order on her laptop before Alawieh's Air France flight departed, and another CBP official in a declaration on Monday said he was made aware that occurred before taking Alawieh to the boarding area.

But the Justice Department said the notification needed to be received through standard channels and be received by the agency's legal counsel for their review and guidance, which did not happen.

"CBP takes court orders seriously and strives to always abide by a court order," Justice Department attorneys wrote.

The Justice Department's filing was later sealed by Sorokin at the request of a lawyer for the cousin. Reuters reviewed it from a public terminal in the courthouse before access was further restricted.

(This story has been refiled to add the first of name of Dr. Rasha Alawieh in paragraph 2)