A University of Minnesota graduate business student who’s being held by Immigration and Customs Enforcement is suing for his immediate release, saying his arrest violated his rights and he’s been given little explanation for why he’s being held.

A University of Minnesota student is fighting for his release after immigration agents swept him off the street.

These are troubling times, and this situation is unlike any we have navigated before,” the university president said in a statement.

U.S. Justice Department lawyers say a Tufts University doctoral student from Turkey who was detained by immigration authorities had been moved to Vermont by the time a federal judge ordered that she b

Rümeysa Öztürk’s defense attorneys argue that Öztürk, a 30-year-old PhD student from Turkey, is being targeted for taking a public pro-Palestinian stance on Tufts campus last year in violation of her First Amendment right to free speech.

Within an hour of sweeping Tufts University student Rümeysa Öztürk off a sidewalk near the Somerville campus last week, immigration agents were quickly on the move.

Rümeysa Öztürk, a Tufts University graduate student, was arrested in Massachusetts and sent to the South Louisiana ICE processing center in the swamplands of Evangeline parish in Basile. Sending detainees to the cluster of remote immigration detention centers known as “Detention Alley” in the south is a common practice.

Tufts University is calling on ICE to release international graduate student Rumeysa Ozturk as the case goes before a federal judge in Boston Thursday afternoon. CBS News Boston's Tiffany Chan and CBS News Department of Justice correspondent Scott MacFarlane have the latest.

As ICE agents arrest international students at campuses across the U.S., professor Daniel Kanstroom discusses the law — and the human cost. He says the round-ups are designed to "send a message."