Officials with the U.S. Northern Command said that they started work Monday to prepare Buckley for use by Homeland Security as a temporary detention center.

How many people arrested Sunday were connected to the TdA gang is unclear, but DEA officials said the number was in the dozens.

Undocumented immigrants have rights during arrests, a local hotline to detect ICE raids and other tools to handle deportations.

Among President Trump’s many immigration policies implemented since he took office, his plan for mass deportations has rattled migrant communities in Colorado and beyond.

Federal agents interrupted a party at a "makeshift nightclub" north of Denver early Sunday morning and arrested almost 50 people of undetermined immigration status, a large number of whom are reportedly affiliated with the Venezuelan Tren de Aragua gang.

Drug Enforcement Administration officials said many of the immigrants were connected to Tren de Aragua and are in Immigration and Customs Enforcement custody.

Federal law enforcement agents took almost 50 people, including many who were undocumented, into custody Sunday in Adams County.

The Drug Enforcement Administration on Sunday morning detained 49 people in Adams County, Denver7 spoke with immigration advocates to hear their reactions and concerns to the raid.

Immigration and Customs Enforcement (ICE) postponed an immigration crackdown operation in Aurora, Colorado claiming knowledge of the effort had spread throughout the community and agents could be affected.

Border czar Tom Homan told NBC News that several people with criminal convictions were apprehended in Chicago.

Federal agencies working in California pledged cooperation in immigration enforcement operations and posted photos of people being taken into custody.

The Drug Enforcement Administration on Sunday morning detained 49 people in Adams County, Denver7 spoke with immigration advocates to hear their reactions and concerns to the raid.