DENVER (KDVR) — More than a dozen people have been removed from the U.S. after an April U.S. Drug Enforcement Administration Rocky Mountain Field Division (DEA RMFD) operation at an underground Colorado Springs nightclub, a U.S. Immigration and Customs Enforcement (ICE) spokesperson confirmed to FOX21’s sister station in Denver, FOX31.

The spokesperson said 18 people arrested were subject to final orders of removal, which allows ICE to remove people from the country, according to the agency’s website. The spokesperson also confirmed 86 people are still in ICE custody pending immigration proceedings, bringing the total number of arrests from the April operation to 104 people in the U.S. illegally.

The operation, which took place early in the morning hours of Sunday, April 27, was centered on a nightclub called Warike that was the subject of “reports of disturbances, shots fired, shootings, felony assaults resulting in serious bodily injury, liquor law violations, narcotics activity, trespassing, and the presence of individuals wanted by law enforcement,” according to the ICE spokesperson.

The U.S Attorney’s office for the District of Colorado also said about 17 active U.S. servicemembers were at the nightclub either patronizing or working as security, including an Army staff sergeant facing cocaine distribution charges.

The people who were found to be in the U.S. illegally are from: Guatemala, Cuba, El Salvador, Mexico, Venezuela, Colombia, Nicaragua, Chile, and Honduras, the ICE spokesperson said, and 14 of them have criminal charges or convictions.

Some of the people arrested are suspected of being members of or distributors for the Mexican Sinaloa cartel, as well as various theft, drug and assault cases. One was also alleged to be part of a criminal organization tied to credit card skimming, fuel theft and illegal marijuana growing, the spokesperson said.

Additionally, officials seized 12 firearms and multiple types of illicit drugs, including cocaine, pink cocaine (tusi) and methamphetamine.