A person walks on campus at University of Minnesota in Minneapolis on April 21, 2020. (Glenn Stubbe/Star Tribune via AP, File)

MINNEAPOLIS (AP) — Officials in Minnesota are seeking answers in the case of a University of Minnesota graduate student who’s being detained by U.S. immigration authorities for unknown reasons.

University leadership said Immigration and Customs Enforcement detained the student Thursday at an off-campus residence. Officials said the school was not given advance notice about the detention and did not share information with federal authorities. The student’s name and nationality have not been released.

As the case remained largely a mystery, state and local leaders called on federal authorities to explain their actions.

“My office and I are doing all we can to get information about this concerning case,” Minnesota Sen. Amy Klobuchar said in a post on the social media site X. “We’re in contact with the University and understand they had no prior warning or information that led to this detainment.”

She said that international students are “a major part of the fabric of life in the school and our community.”

The detained student is enrolled in business school at the university’s Twin Cities campus. University officials said the school is providing the student with legal aid and other support services.

The university’s graduate labor union organized a protest Saturday outside the U.S. Citizenship and Immigration Services office in downtown Minneapolis. Organizers said they stood in solidarity with international students facing uncertain futures as the new Trump administration pursues an immigration crackdown that has targeted people with ties to American colleges and universities.

“An increasing number of international students are being detained without due process across the country,” leaders of the University of Minnesota Graduate Labor Union-United Electrical Local 1105 said in a statement. “These constitutional violations are part of a larger plan to continue stripping our rights away from us, starting with immigrants. It will not stop there.”

The Trump administration has cited a seldom-invoked statute authorizing the secretary of state to revoke visas of noncitizens who could be considered a threat to foreign policy interests. More than half a dozen people are known to have been taken into custody or deported in recent weeks. Most of the detainees have shown support for Palestinian causes during campus protests over the war in Gaza last year.

“An attack on one of us is an attack on all of us,” the union’s president, Abaki Beck, said in a statement.

What prompted authorities to detain the University of Minnesota student is still unknown. ICE officials have not responded to an Associated Press email requesting comment.

Minnesota Gov. Tim Walz said on X that he is in touch with the U.S. Department of Homeland Security.

“The University of Minnesota is an international destination for education and research,” Walz wrote. “We have any number of students studying here with visas, and we need answers.”

Minneapolis Mayor Jacob Frey also called the case “deeply troubling.”

“Educational environments must be places where all students can focus on learning and growing without fear,” he wrote on X.

Officials promised to release more information about the case once they have updates.

“International students are huge assets to the University of Minnesota,” U.S. Sen. Tina Smith of Minnesota said in a Facebook post. “They move thousands of miles away from their families and support systems to learn from the best and the brightest. I can’t imagine how terrified they are after learning ICE has detained one of their classmates.”

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