CHICAGO (WLS) -- A federal appeals court is blocking the release of hundreds of people detained by immigration agents during "Operation Midway Blitz" in the Chicago area, at least for now.

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The case centers around whether the government violated a consent decree banning warrantless arrests in certain cases.

The appeals court said each detainee's case should be evaluated individually.

The following is from a previous ABC7 I-Team report last month on a federal judge's initial ruling for the detainees to be released.

A federal judge has ordered the release of hundreds of migrants arrested in the Chicago area, including some arrested under the Department of Homeland Security's "Operation Midway Blitz," by Nov. 21 after finding thei

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