Jarnjak made the statement at a news conference in the parliament headquarters after three Committee members - Pero Kovacevic of the Party of Rights (HSP), Ante Markov of the Peasant Party (HSS), Srecko Ferencak of the People's Party (HNS), and the HSP club of deputies asked that the Committee convene to discuss the broadcasting of the audio recording and invite SOA director Tomislav Karamarko to the session.
Addressing reporters, Kovacevic said he expected the Committee to convene soon. He recalled that the Brijuni transcripts were considered a state secret and that the HSP had no information that the document had been declassified, except for the purpose of proceedings at the Hague war crimes tribunal.
Kovacevic said he doubted the authenticity of the audio recording.
"We believe that the audio recording was doctored to corroborate the transcript sent to the Hague tribunal," the HSP deputy said.
HSS deputy Ante Markov said he could not state with certainty that the document in question was a state secret, but that it was the Committee's duty to establish if the case involved unlawful activity.
Ferencak said he did not want to enter into debates on whether the recording should be kept secret or not, but that documents "cannot be published whenever someone feels like it".
Committee chairman Jarnjak said that several days ago he had requested the Security Intelligence Agency (SOA) and the Office of the National Security Council to investigate if the broadcast recording was classified.
Jarnjak said he expected relevant bodies to voice their position by the middle of next week, when he would call a session of the Committee.
He also announced that applications would be invited for members of the Council for the Civilian Supervision of Security Services.
The announcement was in line with a decision proposing that the Council be adjusted to the new Law on the Security-Intelligence System by changing its name to the Council for the Civilian Supervision of Security-Intelligence Agencies.