A class-action lawsuit seeks to stop ICE officers from arresting migrants who appear at immigration courts and placing them on a fast-track to deportation.

The U.S. Department of Homeland Security is defending its policy of having Immigration and Customs Enforcement officers arrest people at their immigration court hearings after a group of immigrants and advocates filed a class-action lawsuit that seeks to stop the practice.

Civil rights groups sued the Trump administration on Wednesday in a bid to stop the government’s policy of allowing Immigration and Customs Enforcement officers to arrest undocumented migrants who show up for immigration hearings at courthouses.