Families of employees at a McAllen warehouse endured a long, hot, and chaotic Thursday as U.S. Immigration and Customs Enforcement (ICE) agents questioned and possibly detained workers.

At least 400 people were inside the building at 7901 S. 23rd St. when ICE agents arrived around 10 a.m., Maria Gonzalez, an immigrant rights community organizer at the scene, said.

Tres Dimensiones Ropa Usada, a used clothing wholesaler facing Texas Highway 115, appeared to be the primary target. Agents were seen escorting small groups of people out of the building, though it was unclear if they were customers or employees.

However, Tres Dimensiones is just one of several businesses operating inside the 8-acre warehouse.