American Civil Liberties Union is faulting the Pinal County Jail in Florence over jail conditions for immigrant detainees.

The ACLU of Arizona sent a letter this week to federal Immigration and Customs Enforcement and Department of Homeland Security officials that threatened litigation, calling the conditions at the jail "unconstitutional."

Victoria Lopez, program director for the ACLU of Arizona, said the complaint about the conditions specifically applies to a separate wing of the facility that has 625 beds set aside for immigrants detained by ICE. The group says those detainees have no access to outdoor exercise, no face-to-face contact with loved ones, and an unsanitary environment,

Sheriff Paul Babeu said his jail is the best run adult detention center in Arizona.