According to the paper, Finland decided to reveal its discontent with the way Slovenian authorities have handled the Patria investigation at a 17 June meeting of an OECD task group dealing with the implementation of the OECD Anti-Bribery Convention.
The Finnish delegation had sent to all the members of the OECD, which Slovenia has been trying to join for years, a note of protest in which Slovenia is for instance reproached for needing eight months to conduct the first house searches in the alleged bribery scandal involving Finnish defence contractor Patria and Slovenia.
What is more, secret data has been leaking to suspects in Slovenia and the state prosecutor general has had contact with the suspects, Dnevnik reports on Finnish complaints.
Cooperation with Austrian authorities - also involved because alleged middlemen were stationed in Austria - has been much better, the protest note moreover says, stating for instance that the Austrians had carried out the house searches after only a few days.
According to Dnevnik, the reservations regarding Slovenia voiced by Finland have also been backed by the US.
The Slovenian delegation, headed by Corruption Prevention Commission boss Drago Kos, arrived at the meeting on 18 June, when the Finns had already left Paris.
It issued a note in which the remark about the involvement of State Prosecutor General Barbara Brezigar was labelled as misplaced and other accusations as unfounded.
The delegation informed Brezigar about the situation upon returning to Slovenia, which prompted the prosecutor to protest with Pahor, saying she would protect the integrity of her person and of the prosecution.
A series of meetings and phone conversations followed, featuring Pahor, Brezigar, Justice Minister Ales Zalar, Foreign Minister Samuel Zbogar as well as the chief negotiator for Slovenia's membership of the OECD, Development Minister Mitja Gaspari, Dnevnik reported.
The Office of the State Prosecutor General confirmed for STA that a letter had been sent to Finnish Justice Minister Tuija Brax in which Brezigar strongly protested against the false claims made in the note of protest and demanded and explanation.
Slovenia started its OECD accession process in May 2007 when it received an invitation to join the organisation 11 years after applying for membership.
The 2006 contract with Patria worth EUR 278m has been making headlines since September last year when Finnish broadcaster YLE ran a report claiming that Patria distributed some EUR 21m in bribes to Slovenian officials to get the deal.
The report suggested that the bribes went as high as the then Prime Minister Janez Jansa. Jansa has vehemently denied the claims.
Media reported on 19 March that Brezigar's name had came up in a police list of people contacted by the suspects in the investigation. Brezigar denies having contacted suspects on this matter.