CHICAGO - More than 900 people have been arrested so far during Operation Midway Blitz, according to the Department of Homeland Security.

What we know:

The agency on Thursday released video of an immigration raid at an apartment building in the 7500 block of South Shore Drive from earlier this week.

At least 37 undocumented immigrants were taken into custody, some with alleged ties to the Tren de Aragua gang, DHS said.

In its social media post sharing the video, DHS wrote: "To every criminal illegal alien: Darkness is no longer your ally. We will find you."

The footage shows dozens of federal agents surrounding the South Shore apartment building.

According to a previous FOX 32 report, Chicago police did not participate in the raid.

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