An Iranian national sought by the United States in connection with a series of mass hacking attacks that inflicted an estimated $3.4 billion in damages has been taken into custody in Montenegro, authorities in the Balkan nation announced late Thursday.

The 39-year-old suspect, who possesses both Iranian and Turkish citizenship, is being sought by a federal court in New York on multiple criminal counts, including conspiracy to commit computer fraud, hacking, and identity theft, according to an official statement. Police located the individual in the coastal town of Kotor, where he was arrested Thursday at the request of the United States and the FBI, Montenegrin law enforcement added.

Authorities allege that the suspect “from 2013 onward … carried out mass hacking attacks on the infrastructure of the United States of America,” targeting more than 150 universities. The stolen data was subsequently used by Iran’s Islamic Revolutionary Guard Corps and Iranian academic institutions, police said.

An extradition hearing will be handled by a court in the capital, Podgorica. Montenegro, a U.S. ally and NATO member with a population of just 620,000, is widely considered the next candidate for accession to the European Union.