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

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.

News of the student’s detention — and the lack of an official explanation — sparked student protests and expressions of concern from university and political leaders. Gov. Tim Walz told reporters Monday that he spoke with Homeland Security Secretary Kristi Noem about it Friday and was still waiting for further details.