The Rocky Mountain Division of the Drug Enforcement Agency (DEA) led a multi-agency enforcement operation alongside local police and federal agents at 3am Sunday, the agency said. 

Dozens of armed personnel were waiting outside the doors as partyers fled from the building - while women in dresses and heels looked bewildered at the ordeal.

Another woman, who was on the phone at the time, dropped to the ground while cops pointed guns in her direction after bashing in the door of the illicit establishment.  

Another man ran out of the nightclub, and upon seeing the officers he desperately put both arms in the air and dropped to his knees. Another was seen on video dropping his bottle of beer on the ground before listening to cops' instructions.

Sirens glared in the background as officers shouted for people to get on the ground - while some of the revelers screamed and attempted to run away from the situation. 

The operation itself was part of a probe into drug trafficking, prostitution and crimes of violence taking place in the club, the DEA added.

Authorities made their way to an underground nightclub in Colorado Springs - about an hour away from Aurora, where Venezuelan criminal organization Tren de Aragua is based. 

Tren de Aragua, MS-13, and Hell's Angels gang members are known to frequent the underground club. It is unclear how many members were there at the time of the raid, DEA Special Agent in Charge Jonathan Pullen said. 

More than a dozen active duty service members were also in the building, some as patrons and others working security. The United States Army Criminal Investigation Division is now a part of the investigation into those individuals, Pullen said. 

Many of those detained were not in the country legally and taken into Immigration and Customs Enforcement (ICE) custody. Drugs and weapons were also seized during the operation, the agency said.

Pink cocaine, also known as 'tusi,' was among the drugs found, Pullin said. At least a dozen small packages of drugs were found as investigators are testing them to identify the substances.