Oct. 20 (UPI) -- Immigrations and Customs Enforcement and Border Patrol officials are expected to appear in court on Monday to after a judge last week demanded the agency answer questions about its operations in Chicago.

U.S. District Judge Sara Ellis for the Northern District of Illinois on Friday ordered ICE and Border Patrol officers to wear body cameras. They were expected in court to explain their tactics, including the use of tear gas, as officers and residents have clashed across the city.

The case was brought as Operation Midway Blitz has led to the arrest of more than 1,000 people in Illinois over the past month after the Trump administration sent federal forces there.

Ellis, who was nominated for the bench by former President Barack Obama, on Thursday ordered federal agents to stop dispersing crowds from places they are legally permitted to be, stop using tear gas on people who are not a threat and start wearing the cameras.

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