An employee of a Chicago day care center and preschool was detained by immigration agents at work as children were being dropped off Wednesday, according to witnesses, reflecting the Trump administration's increasingly aggressive enforcement tactics.

The employee ran from a vehicle into the Rayito de Sol Spanish Immersion Early Learning Center after officers pulled into the parking lot right after her, Alderman Matt Martin said, citing witness accounts. The employee was detained at the entry while telling authorities she has papers, he said. Authorities went inside to question several people around 7 a.m., when the facility opened, according to witnesses.

It was unusual even under "Operation Midway Blitz," which has resulted in more than 3,000 immigration arrests in the Chicago area sinc

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