The Cook County Sheriff's Office said the arrests were made by midday, and that it was working on verifying identities and potential charges.

Department of Homeland Security agents were shot at during an immigration enforcement operation in Chicago Saturday, the agency said — as federal agents were also accused of using pepper spray and flash-bang grenades against protesters across the Chicago area.

Authorities arrested 21 protesters Friday outside a Chicago-area federal immigration facility that activists say functions as a de facto detention center and is plagued by inhumane conditions. The Cook County Sheriff's Office said the arrests were made by midday,

The Department of Homeland Security closed its command center at Naval Station Great Lakes on Friday, a local official said.

The federalized California and Texas National Guard members sent to Portland and Chicago will return to their home states, according to two U.S. officials.

A Chicago day care employee detained by immigration agents has been released, her attorneys say. Diana Santillana Galeano was detained last week at Rayito de Sol Spanish Immersion Early Learning Center.

A man in Chicago fired shots at U.S. Border Patrol agents during an immigration enforcement operation on Saturday, the Department of Homeland Security said, but the Chicago Police Department said it did not find anyone injured.

A daycare teacher has been released after being detained by U.S. Immigration and Customs Enforcement agents in Chicago's North Center neighborhood last week.