A person walks through the Georgia Tech campus with the downtown skyline in the background on March 11, 2016, in Atlanta. Colleges have been left stunned as hundreds of international students have seen their legal status terminated by the federal government, with few corners of higher education left untouched. Associated Press file photo

WASHINGTON — At first, the bar association for immigration attorneys began receiving inquiries from a couple students a day. These were foreigners studying in the U.S., and they’d discovered in early April their legal status had been terminated with little notice. To their knowledge, none of the students had committed a deportable offense.

In recent days, the calls have begun flooding in. Hundreds of students have been calling to say they have lost legal status, seeking advice on what to do next.

“We thought it was going to be something that was unusual,” said Matthew Maiona, a Boston-based immigration attorney who is getting about six calls a day from panicked international students. “But it seems now like it’s coming pretty fast and furious.”

The speed and scope of the federal government’s efforts to terminate the legal status of international students have stunned colleges across the country. Few corners of higher education have been untouched, as schools ranging from prestigious private universities, large public research institutions and tiny liberal arts colleges discover status terminations one after another among their students.

At least 600 students at more than 90 colleges and universities have had their visas revoked or their legal status terminated in recent weeks, according to an Associated Press review of university statements and correspondence with school officials. Advocacy groups collecting reports from colleges say hundreds more students could be caught up in the crackdown.

Students apparently targeted over minor infractions

Around 1.1 million international students were in the United States last year — a source of essential revenue for tuition-driven colleges. International students are not eligible for federal financial aid, and their ability to pay tuition often factors into whether they will be admitted to American schools. Often, they pay full price. Many of the students losing their legal status are from India and China, which together account for more than half the international students at American colleges. But the terminations have not been limited to those from any one part of the world, lawyers said.

Four students from two Michigan universities are suing Trump administration officials after their F-1 student status was terminated last week. Their attorney with the American Civil Liberties Union, Ramis Wadood, said the students never received a clear reason why.

“We don’t know, and that’s the scary part,” he said.

The students were informed of the status terminations by their universities via email, which came as a shock, Wadood said.

The reason given was that there was a “criminal records check and/or that their visa was revoked,” Wadood said, but none of them were charged or convicted of crimes. Some had either speeding or parking tickets, but one didn’t have any, he said. Only one of the students had known their entry visa was revoked, Wadood said.

Last month, Secretary of State Marco Rubio said the State Department was revoking visas held by visitors who were acting counter to national interests, including some who protested Israel’s war in Gaza and those who face criminal charges.

But many students say they don’t fall under those categories. Students have filed lawsuits in several states, arguing they were denied due process.

In New Hampshire, a federal judge last week granted a temporary restraining order to restore the status of a Ph.D. student at Dartmouth College, Xiaotian Liu, while he challenges the revocation of his visa. On Tuesday, a federal judge in Wisconsin issued a similar order, ruling the government could not take steps to detain or revoke the visa of a University of Wisconsin-Madison gradate student.