Visas of several current and former international students at Central Michigan University have been "terminated" by the U.S. Department of Homeland Security, the school said.

According to a letter sent by the university, staff members learned of the students' records being terminated by federal officials during routine reviews of the Student and Exchange Visitor Information System (SEVIS). 

The school says neither administration nor the impacted students were notified of the revocations.

"CMU does not have the ability to reverse the government's decision to terminate a student's visa status, nor can the university's Office of General Counsel provide legal guidance or services to individual students, faculty, and staff," the letter says. 

According to the school's policy, the Office of International Student and Scholar Services is running daily checks on international student records and will "immediately" reach out to any person whose status has changed.  

As of Sunday night, there have been no reports of U.S. Immigration and Customs Enforcement or Customs and Border Protection officers on campus, according to the school.

The school says it has designated certain spaces on campus, including residence hall rooms and faculty offices, where ICE agents need a judicial warrant to enter. Immigration officers, however, do not need a warrant to enter public spaces.

University President Neil MacKinnon and Provost Paula Lancaster signed the letter. 

The Trump administration's recent crackdown on some students with visas and green cards has raised questions about First Amendment rights, however, Secretary of State Marco Rubio last month cited a provision in the Immigration and Nationality Act that authorizes the nation's top diplomat to revoke the visas of foreign national students because their presence or activities have "potentially serious adverse foreign policy consequences" for the U.S. 

The letter from CMU concluded with, "To our international students, faculty, and staff: You are welcome here, and we are glad to have you as members of our community. In uncertain times, we rely on our friends, colleagues, and neighbors to help us weather challenges. Thank you in advance for offering compassion and kindness to our students and to each other as we navigate these changes."

A spokesperson for the University of Michigan on Friday said four of their students had their visas revoked by DHS. The university said that administrators have contacted the impacted students "to advise them of potential consequences of this action."

The ACLU of Michigan and Michigan Immigrant Rights Center released the following joint statement on the visas being revoked:

The ACLU of Michigan and Michigan Immigrant Rights Center condemn the Trump administration's continued use of authoritarian tactics to attack international and noncitizen students and our higher education system.

Abruptly revoking international student visas of immigrant students at the University of Michigan, Central Michigan University, and other universities and colleges in Michigan and around the nation is another attempt by this administration to sow chaos and fear, needlessly upending the future of these students' education and lives. These actions highlight the complete lack of due process and fairness that citizens and non-citizens are facing across our immigration system, and the erosion of students' first amendment rights. 

The termination of status for many of these students is an even more insidious threat to due process. These determinations provide no opportunity to respond and cannot easily be challenged within the United States by the students or the universities and colleges. 

America's universities and colleges have long stood as beacons for freedom and democracy, but today that light is diminished.  This administration continues to drive the false narrative that noncitizens are villains - and it is a lie. International and noncitizen students are valued members of our campus and local communities, and contribute to community life in myriad ways. 

Together, we will continue to fight for the rights of vulnerable communities and push back on cruel efforts aimed at dividing us. We will not fall for it. A threat to one community is a threat to all of us and all of our rights.

We urge students and their families to contact an immigration attorney for assistance and closely monitor their email for any communication from the U.S. Department of Homeland Security and their school. 

CBS News Detroit has reached out to Wayne State University and Michigan State University to determine whether similar incidents occurred at their institutions, and is awaiting responses.