The Denver Post reports about 2,000 people gathered at the center in Aurora on Friday night before a candlelight vigil. Protesters packed close to the entrance and raised the Mexican flag and an upside-down American flag on the facility’s flagpoles.
The privately run facility contracts with U.S. Immigration and Customs Enforcement.
President Donald Trump says the roundups will begin Sunday, and his agents plan to eventually arrest millions of immigrants in the country illegally. Administration officials have said they’re targeting about 2,000 people in the national sweep, which would yield about 200 arrests based on previous crackdowns.