(CNN) — Adults and children alike were pulled from their Chicago apartments, crying and screaming, during a large overnight raid that has left tenants and neighbors shaken.

“I’ve been on military bases for a good portion of my life,” said Darrell Ballard, who lives in the building next door. “And the activity I saw – it was an invasion.”

Ballard recalled seeing residents detained outside the building for hours, after seeing a Black Hawk helicopter flying over the five-story building in the city’s South Shore neighborhood and military-sized vehicles and agents filling the parking lot early Tuesday morning.

All were part of a multiagency operation that led to the arrest of 37 undocumented immigrants, most of them from Venezuela but also including people from Mexico, Nigeria and Colombia,

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