Federal agents interrupted a party at a "makeshift nightclub" in north 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.

The exact number of people arrested was unavailable Sunday morning, but DEA officials said “dozens” connected to the TdA gang were detained.

Along with the DEA, U.S. Immigration and Customs Enforcement (ICE), Homeland Security and ATF agents, as well as local law enforcement, took part in the raid.

According to the Drug Enforcement Administration’s Rocky Mountain Division, the operation happened at a makeshift nightclub in Adams County. Drugs, weapons, and cash were all seized from the raid and all suspects were taken away on a bus. In a series of social media posts, the DEA said Homeland Security and ATF agents were also a part of the raid.

The Drug Enforcement Administration detained 49 people in Adams County early Sunday morning at what the special agent in charge called an invitation-only Tren de Aragua party.