The agency said detectives had opened a criminal investigation under Article 182 of Ukraine's Criminal Code, which covers violations of privacy. Investigators are currently working to establish all circumstances surrounding the incident, including the identities of those who may have installed the equipment.
NABU said the owner of the apartment directly above the detective's residence told investigators that individuals identifying themselves as law enforcement officers had approached him and claimed that a Russian spy was living in the apartment below. During the investigation, detectives identified one of those individuals as a current employee of Ukraine's Security Service (SBU).
The bureau noted that the detective involved is working on several high-profile investigations, including cases related to alleged corruption in the customs sector, the activities of certain law enforcement officials and state-owned enterprises.
NABU said any unlawful attempts to obtain information about its employees are unacceptable because they may undermine the bureau's independence and interfere with anti-corruption investigations.
"The independence of NABU and guarantees that its employees can perform their duties without interference are among the key conditions for an effective fight against corruption. All circumstances surrounding this incident will receive a proper legal assessment as part of the pretrial investigation," the bureau said.