U.S. Immigration and Customs Enforcement launched a telephone hotline for detained immigrants to inform them of their rights and allow them to report cases of unfair treatment.

The new number, (855) 448-6903, may be used by detained immigrants who “believe they may be U.S. citizens or victims of a crime,” ICE said in a communique.

To make sure that those in custody “are properly notified about their potential removal from the country and are made aware of their rights,” ICE guarantees that the line will be available 24 hours a day every day with interpreters in several languages.

The president of the Mexican American Legal Defense and Educational Fund, Thomas Saenz, believes the new line is “a positive development,” though he also called the move “overdue” and “inadequate.”