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

A group of immigrants and civil rights groups is suing the Trump administration in an effort to halt arrests at United States courthouses when defendants appear for immigration proceedings.

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.