In a predawn sweep in San Antonio, 20 individuals were detained — some of whom are believed to be members of the notorious Venezuelan prison gang Tren de Aragua. Nineteen of the 20 are facing charges.

“Operation Aurora” marks a significant development in an ongoing crackdown on this transnational organization that has been operating in San Antonio. About 300 empty apartments were inspected by members of the San Antonio Police Department, Texas Department of Public Safety, FBI, Homeland Security Investigations, ATF and other Texas Anti-Gang Unit members. Police said these vacant apartments are suspected of being used by Tren de Aragua members.

Three Homeland Security Enforcement and Removal Operations agents are supporting Operation Aurora at the City Magistrate building, placing ICE detainers on those arrested.

The initiative stemmed from intelligence gathered by undercover officers within the Migrant Resource Center, according to the San Antonio Police Department.

The raid is part of a broader effort to disrupt Tren de Aragua’s influence in Texas. The prison gang was founded in Venezuela’s state of Aragua. Since then, law enforcement believes the gang has made its way to the United States mixed in with migrants. It is thought that Tren de Aragua in San Antonio is involved in prostitution, the sale of cocaine and other violent crimes.

“Known and suspected gang activity will be investigated and dismantled when found to be operating within the San Antonio community. The safety of our residents and first responders is our top priority, “ San Antonio Police Department Chief William McManus said in a statement.

In a news conference, McManus said, “We are on to you, and we are coming for you. We know who you are, and we are coming for you.”