Overnight on Tuesday, Sept. 30, federal agents from different agencies raided an apartment building on the South Side of Chicago, the nation’s third-largest city by population. Armed federal agents in military fatigues busted down doors, pulling men, women and children — some of them allegedly naked — from their apartments, residents and witnesses told the Chicago Sun-Times.

A spokesperson for the Department of Homeland Security said agents with Border Patrol, the FBI and the Bureau of Alcohol, Tobacco, Firearms and Explosives arrested 37 people without legal immigration status, including some with criminal records. The spokesperson claimed the South Shore neighborhood is “a location known to be frequented by Tren de Aragua members and their associates.”

“Due to the size of this operation, DHS law enforcement is continuing to gather more information on those arrested and will provide more information when available,” the spokesperson said. “Federal law enforcement officers will not stand by and allow criminal activity flourish in our American neighborhoods.”