OMAHA, Neb. — Dozens more people face federal charges related to an ongoing investigation into so-called ATM jackpotting, a scheme that uses malware to force machines to dispense cash.

The U.S. Attorney’s Office for Nebraska says 31 people were federally indicted in Nebraska last week, bringing the total number charged to 87 as part of a nationwide investigation.

Investigators say some of the defendants are Colombian and Venezuelan nationals connected to Tren de Aragua, a Venezuelan-based transnational criminal organization designated by the U.S. government as a foreign terrorist organization.

Authorities say the group used malware to empty ATMs across Nebraska and elsewhere in the country, sending the proceeds back to members and associates to fund criminal activity.

The investigation is nationwide in scope, with cooperation from eight FBI offices, including Omaha.

“A dedicated team of FBI Omaha agents and analysts is working shoulder to shoulder with local, state and federal partners to disrupt and dismantle an international criminal conspiracy that ultimately funds a foreign terrorist organization,” said Eugene Kowel, special agent in charge of the FBI’s Omaha Field Office.

“The wide variety of sophisticated criminal tactics employed by Tren de Aragua poses a direct threat to communities across the country,” Kowel said. “This case highlights the group’s plot to deploy malware to steal vast sums from financial institutions across the United States. We will never stop following the money and surging resources to arrest and apprehend Tren de Aragua members and leadership.”

The indictment alleges 32 counts, including conspiracy to commit bank fraud, conspiracy to commit bank burglary and computer fraud, bank fraud, bank burglary, and damage to computers.

Those charged face potential prison sentences ranging from decades to hundreds of years if convicted.