Ukraine’s Security Service (SBU) announced on Sunday that it has eliminated two suspected Russian agents allegedly involved in the assassination of an SBU officer earlier this week in Kyiv. The agency directly accused Russia’s Federal Security Service (FSB) of orchestrating the attack.

The slain officer, Ivan Voronich, was killed in what authorities have described as a targeted execution on Thursday morning in the Ukrainian capital. According to an official statement by the SBU, the suspects—a man and a woman—fled following the shooting but were tracked down to a hideout in the greater Kyiv area through coordinated efforts by the SBU and the National Police.

Vasyl Maliuk, head of the SBU, confirmed that “as a result of covert investigations and active counterintelligence operations, the enemy hideout was discovered.” Maliuk added that during the arrest operation, the suspects resisted, leading to an exchange of gunfire in which both individuals were killed.

The agency said the pair had been tasked with surveilling their target to determine his routine before luring him to a location where a silenced pistol awaited. The operation underscores what the SBU claims is direct FSB involvement in acts of sabotage and targeted killings within Ukrainian territory.

The SBU, Ukraine’s main domestic security agency, is responsible for counterintelligence and internal security. It also conducts operations against Russian interests, including sabotage missions. Notably, the agency was linked to last month’s drone strikes on Russian airfields—among the most daring attacks of the conflict to date.

The assassination of officer Voronich comes amid an escalation in Russian attacks on Ukraine. This past week saw the largest and second-largest drone assaults since the start of the war, which is now in its fourth year.

Ukrainian authorities have yet to release further details on the identities of the deceased suspects or whether additional operatives may be involved. The SBU has stated it will continue investigations and operations to prevent further Russian infiltration.