 Aside from the two explosions in Zagreb, agents assigned to Operation Labrador were thought to also be responsible for bombing the Zagreb–Belgrade railway near Vinkovci and a railway line between Glina and Vojnić.The railway attacks have also been ascribed to Operation Opera.In the immediate aftermath of the bombings in Zagreb, Josip Manolić, who had just been appointed head of the Croatian intelligence service, claimed Croatian right-wing extremists were responsible.