The authorities took nearly a month to analyze the captured documents, allowing time for the principal agents involved in the bombings to flee.

Five KOS agents involved in Operation Labrador were tried in the Federal Republic of Yugoslavia on terrorism charges and acquitted.

The existence of Operation Labrador was further confirmed through the testimony of a former KOS agent, Major Mustafa Čandić, during the trial of Slobodan Milošević at the International Criminal Tribunal for the former Yugoslavia in 2002.

[12] In August 1991, the Yugoslav Air Force's Counterintelligence Service (KOS) executed a series of activities, codenamed Operation Labrador, aimed at discrediting the new Croatian government.

[16][17] In Zagreb, operational control of Labrador was assigned to Lieutenant Colonel Ivan Sabolović,[18] and Major Čedo Knežević.

[14] Operation Labrador was abandoned after the ZNG and the Croatian police captured the Yugoslav Air Force headquarters in Zagreb on 15 September 1991, during the Battle of the Barracks.

The materials captured inside the facility included codes and computer disks related to Operation Labrador, as well as Sabolović's notes.

[16][26] In autumn of 1991, Croatian intelligence services launched Operation Janissary (Operacija Janjičar) aimed at dismantling the remaining KOS network in Croatia.

It was authorized by Ivan Vekić and Gojko Šušak, then interior and defence ministers, and initially headed by Josip Perković.

[27] Fifteen suspects were arrested by the end of 1991; they were subsequently exchanged for Anton Kikaš, who was captured by the JNA while smuggling a plane-load of weapons to Croatia.

[28] Testifying at the Trial of Slobodan Milošević at the International Criminal Tribunal for the former Yugoslavia in 2002, Čandić stated that all Operation Labrador agents left Zagreb and took the remaining documents with them.