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CHICAGO ( WLS ) -- Federal agents returned to neighborhoods on the North Side on Saturday for "Operation Midway Blitz."

An elementary school made last-minute changes to a celebration for residents as agents detained several people nearby on the Northwest Side, and tear gas appeared to be deployed.

The family of Luis Villegas says he was working on a now-unfinished project before he was chased down and arrested by federal agents in front of a house in Old Irving Park. That's when neighbors came outside their homes in his defense before, witnesses say, tear gas was deployed.

The U.S. Department of Homeland Security issued a statement on Sunday, saying that an undocumented immigrant and two U.S. citizens were arrested during Saturday's operation in O

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