Tracking the foreign nationals detained by ICE as tourists or U.S. residents

What we're watching: The United Nations advised its New York-based employees and their family members to carry U.N. identification cards and a copy of their passport page that contains their visa, the New York Times reported on March 24.

• They were warned that they risk being stopped by immigration officials.

Read more about the arrests and detentions:

University of Minnesota

A University of Minnesota graduate student was detained by Immigration and Customs Enforcement agents on March 27, per a letter from the college. He was enrolled on the university's Twin Cities campus and was detained at an off-campus residence.

• The student, identified as Doğukan Günaydın, a Turkish citizen, filed a lawsuit this week seeking immediate release, multiple outlets reported.
• Günaydın argued in the suit that his arrest violated his rights and that he feared at the time of his arrest that he was being kidnapped, per the reports. He said he was given little explanation as to why he was being held.

Zoom in: A federal official said Monday the student was arrested for a drunk driving infraction.

• "This is not related to student protests. The individual in question was arrested after a visa revocation by the State Dept. related to a prior criminal history for a DUI," Tricia McLaughlin, assistant secretary for public affairs at the Department of Homeland Security, posted on X.

University of Alabama doctoral student

"The University of Alabama recently learned that a doctoral student has been detained off campus by federal immigration authorities," per an emailed statement from a college spokesperson Wednesday.

• "UA has and will continue to follow all immigration laws and cooperate with federal authorities," added the spokesperson who did not name the person who was detained, citing privacy laws.
• The University of Alabama College Democrats identified the student in a statement Wednesday as Alireza Doroudi, a PhD candidate studying mechanical engineering.
• Doroudi is originally from Iran and was studying on a student visa, the school's newspaper, The Crimson White, reported.

Turkish student at Tufts

Rumeysa Ozturk, a Turkish national and doctoral student at Tufts University, was detained by the Department of Homeland Security on March 25, per court documents.

• A video showed officers without uniforms, many of whom covered part of their faces, stopping her on a sidewalk.
• Ozturk has been transferred to a Louisiana detention facility, per her lawyer and court records the Boston Globe obtained.

What they're saying: Sunil Kumar, Tufts president, said in a statement following her detention: "The student's visa has been terminated, and we seek to confirm whether that information is true."

French scientist detained for text messages

A French researcher was prevented from entering the U.S. this month because of messages he sent that were critical of the Trump administration's academic research policies, French government officials told multiple outlets.

• The scientist, who hasn't been publicly named, was traveling to a conference near Houston, per Le Monde.
• "Freedom of opinion, free research, and academic freedom are values ​​that we will continue to proudly uphold. I will defend the right of all French researchers to be faithful to them, while respecting the law," Philippe Baptiste, France's minister of higher education and research, said in a statement.

Zoom out: Baptiste said on X he requested an emergency meeting alongside other European ministers to come up with a plan to preserve academic freedom.

• "Europe must rise to the occasion to protect research and welcome the talents who can contribute to its success," he wrote.

Welsh artist and tourist detained over visa issue

Rebecca Burke, a 28-year-old British artist from Wales, was detained on Feb. 26 during "the trip of a lifetime across North America," according to her family and a donation page. She was reunited with her family this month, the BBC reported on March 18.

• When she tried to cross into Canada, authorities thought she needed a work visa and she was told to return to the U.S.
• "She was refused re-entry and classified as an 'illegal alien,'" her father wrote. "Despite being a tourist with no criminal record, she was handcuffed and taken to a detention facility in Tacoma, Washington."

Pro-Palestinian activist and Columbia alumnus arrested

Mahmoud Khalil, a lawful permanent U.S. resident with a green card, was arrested by federal agents, prompting free speech and First Amendment concerns from advocates.

• The DHS said it gathered evidence that he was actively, but not materially, supporting Hamas. He was involved with the pro-Palestinian encampments at Columbia University last year.
• Khalil has not yet been criminally charged.

Georgetown researcher arrested in his Virginia home

Badar Khan Suri, a Georgetown University graduate student originally from India was arrested at his Arlington, Virginia, home on March 17 by masked agents who said his student visa had been revoked.

• He was accused of "spreading Hamas propaganda and promoting antisemitism on social media" and having "close connections to a known or suspected terrorist, who is a senior advisor to Hamas," per DHS spokesperson Tricia McLaughlin.
• Attorneys for Suri argued in a petition for his release that the detention is unlawful.
• A judge on March 20 ordered the Trump administration not to deport Suri, pending a further order from the court.

Brown University doctor detained upon return to the U.S.

Dr. Rasha Alawieh, a Lebanese citizen and H-1B visa holder, was detained this month upon her arrival to a Boston airport.

• She traveled to Beirut for the funeral of Hezbollah leader Hassan Nasrallah, McLaughlin said.
• Brown University sponsored Alawieh's visa after offering her an assistant professorship, per a complaint. She was previously on a J-1 visa.

Canadian visa seeker detained during routine meeting

Jasmine Mooney, a Canadian entrepreneur, was detained at the San Diego border while going through the process to legally obtain a work visa. She was held for about two weeks.

• "There was no explanation, no warning. One minute, I was in an immigration office talking to an officer about my work visa, which had been approved months before and allowed me, a Canadian, to work in the U.S.," she wrote in The Guardian.
• "The next, I was told to put my hands against the wall, and patted down like a criminal before being sent to an ICE detention center without the chance to talk to a lawyer."

Several Germans detained, prompting updated travel advisories

German authorities updated travel advisories for the U.S., warning of immigration enforcement at the border, following the detentions of Germans.

• Lucas Sielaff, 25, returned to Germany this month after spending two weeks in detention, per The Guardian. He incorrectly answered a question about where he lived due to a language barrier when re-entering the U.S. from Mexico.
• Jessica Brösche, 29, was detained for over six weeks, including eight days of solitary confinement. She was traveling with tattoo equipment, and border officers assumed she was intending to work illegally in the U.S., per The Guardian.
• Fabian Schmidt, 34, a permanent U.S. resident originally from Germany, was detained after returning from a trip to Luxembourg on March 7, per NBC News.

Representatives for the White House and Department of Homeland Security did not respond to Axios' request for comment.

Go deeper:

• Germany warns its travelers of tougher U.S. immigration enforcement
• Inside Trump's Supreme plot on immigration
• Immigrant rights activist's arrest marks big shift in enforcement

Editor's note: This story has been updated with details of additional detainments and with information on of case developments.