A group immigrants and legal advocates filed a class-action lawsuit Wednesday that seeks to stop Immigration and Customs Enforcement officers from arresting migrants who appear at immigration courts for previously scheduled hearings and placing them on a fast-track to deportation.

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.

U.S. Immigration and Customs Enforcement announced the arrests of more than 1,300 immigrants in the Houston area last month who were charged with, or have been convicted of, a criminal offense after illegally entering the U.