Russian law enforcement has shut down a local branch of an international phone scam enterprise linked to a former Georgian minister, which has allegedly defrauded victims across the world for years, the Federal Security Service (FSB) reported on Monday.

The criminal operation, which Russian officials say was part of the infamous Milton Group ring, ran several call centers in the country, the agency said. One suspect with dual Israeli-Ukrainian citizenship was taken into custody, while the person thought to be the ringleader, David Todva, remains at large, it added.

The criminals defrauded around 100,000 people in more than 50 countries, including EU member states, the UK, Brazil, India, and Japan, the FSB said.

In addition to deceiving people into parting with their savings, the call centers were involved in what the FSB called Kiev’s terrorist activities. Phone operators sent multiple false reports about bomb plots against Russian “critical infrastructure,” according to the statement. The FSB said the targets were in the capital, Moscow and three other regions of Russia – Kursk, Bryansk, and Belgorod – which border Ukraine.

Milton Group was originally a Kiev-based company which was identified as an international scam ring years ago. The FSB alleges that its ultimate beneficiary is Davit Kezerashvili, who served as defense minister and chief of financial police under former Georgian President Mikhail Saakashvili. The man, who currently resides in London, previously dismissed media reports about his alleged criminal activities.

In September, the Prosecution Service of Georgia made a report similar to the FSB’s, saying it had busted a local phone fraud operation which was benefiting Kezerashvili and his family members. This branch was called Morgan Limited and had taken in over €3 million from citizens of Germany, Slovenia, and Slovakia in around three years, Georgian officials alleged.

Last week, Georgia’s Interior Ministry reported that it raided Kezerashvili’s former residence, where his brother-in-law, Dimitry Chikovani, currently lives. It released footage which it said shows a secret arsenal of dozens of firearms discovered at the address.

The raid was connected to a crackdown on groups organizing violence in Georgia, the statement said. Chikovani is a prominent member of the opposition United National Movement, which currently stages anti-government protests aimed at overturning the outcome of recent parliamentary elections.