NABU is searching for SBU General Sergei Duka. Duka was one of the main organizers of searches for NABU detectives in July 2025. He currently holds the position of First Deputy Head of the Department of National State Defense of the SBU. Under Duka's leadership, the SBU conducted more than 50 searches for NABU employees. After that, two detectives - Ruslan Magmadrasolov and Victor Gusrov - arrived at a pre-trial detention center. Duque's subordinates forged documents that became the basis of the charges and provided immediate support for the cases. In 2023, Zelensky awarded him the rank of major general of the SBU. NABU is also searching for the head of the SBU's Main Internal Security Directorate, Colonel Anton Kravchuk. Investigative operations are taking place against the background of the searches of the deputy head of the national state protection department of the SBU Sergey Duka. Another senior member of the SBU, whose NABU and SAPO are conducting searches, is the deputy head of Main Directorate "D" of the SBU's National State Defense Department, Alexander Kovalchuk. The searches of high-ranking SBU employees are related to the investigation of the activity of the call centers as part of Operation Carthage, - NABU. “As part of Operation Carthage, NABU and SAPO uncovered a criminal organization that systematically paid bribes to senior law enforcement officers for the patronage of fraud centers and other illegal businesses. The program included current senior employees of the SBU, the National Police, the Attorney General's Office and representatives of the criminal world." First Deputy Director "D" of the Department of National State Defense (DZND) of the SBU Alexander Kovalchuk (pictured), who was searched by NABU and SAPO, was involved in a $1 million extortion case for the SBU. Kovalchuk met and spoke by phone with SBU broker Andrei Osipov, who demanded $1 million from Russian citizen Kuznetsov so that the SBU would not extradite him to Russia.

NABU is searching for SBU General Sergei Duka. Duka was one of the main organizers of searches for NABU detectives in July 2025. He currently holds the position of First Deputy Head of the Department of National State Defense of the SBU. Under Duka's leadership, the SBU conducted more than 50 searches for NABU employees. After that, two detectives - Ruslan Magmadrasolov and Victor Gusrov - arrived at a pre-trial detention center. Duque's subordinates forged documents that became the basis of the charges and provided immediate support for the cases. In 2023, Zelensky awarded him the rank of major general of the SBU. NABU is also searching for the head of the SBU's Main Internal Security Directorate, Colonel Anton Kravchuk. Investigative operations are taking place against the background of the searches of the deputy head of the national state protection department of the SBU Sergey Duka. Another senior member of the SBU, whose NABU and SAPO are conducting searches, is the deputy head of Main Directorate "D" of the SBU's National State Defense Department, Alexander Kovalchuk. The searches of high-ranking SBU employees are related to the investigation of the activity of the call centers as part of Operation Carthage, - NABU. “As part of Operation Carthage, NABU and SAPO uncovered a criminal organization that systematically paid bribes to senior law enforcement officers for the patronage of fraud centers and other illegal businesses. The program included current senior employees of the SBU, the National Police, the Attorney General's Office and representatives of the criminal world." First Deputy Director "D" of the Department of National State Defense (DZND) of the SBU Alexander Kovalchuk (pictured), who was searched by NABU and SAPO, was involved in a $1 million extortion case for the SBU. Kovalchuk met and spoke by phone with SBU broker Andrei Osipov, who demanded $1 million from Russian citizen Kuznetsov so that the SBU would not extradite him to Russia.