An investigating judge of Zagreb County Court on Friday evening imposed 30-day pre-trial detention on 10 suspects in the influence-peddling probe which also implicates the Janaf oil pipeline operator's CEO, Dragan Kovacevic, the Elektrocentar company's founder Kreso Petek and two mayors.

There are 13 suspects covered by the investigation so far.

The decision on remanding in the mayors, Drazen Barisic of Velika Gorica, and Vinko Grgic of Nova Gradiska, is expected to be made on Saturday.

The 10 suspects have been taken into investigative custody for fear of tampering with witnesses.

The Office for the Suppression of Corruption and Organised Crime (USKOK) on Thursday evening launched an investigation into the CEO of oil pipeline operator Janaf and another twelve people on suspicion of influence peddling, bribery, illicit preferential treatment, and aiding and abetting in these crimes.

The main suspect Petek allegedly gave Kovacevic HRK 1.96 million in reward for business deals awarded to his company by JANAF since September 2019.

He is also suspected of giving HRK 100,000 to the mayor of Nova Gradiska, in reward for helping award a deal in a public tender to a consortium that included Petek’s company.

The mayor of Velika Gorica allegedly ensured the award of a HRK 97.3 million public procurement deal to Petek’s company. Using his mayoral position, he asked the chairman of the board of the local water management company to modify public tender documentation to suit the demands of Petek and his consultant.