"To change the terms of investment at tender stage is unacceptable and irresponsible. A similar thing happened with the Katarina-Monumenti site. A few days after the closure of the tender process a similar decision was made that fully changed the tender terms," Jakovcic said in a statement issued on Tuesday evening.
"Such behaviour of individuals undermines the reputation of the Republic of Croatia and requires urgent measures and severe sanctions because of their irresponsible behaviour," he added.
Jakovcic called on interested investors not to apply for the tender for the Hidrobaza site in Pula and the Pineta site in nearby Fazana because as head of Istria County he cannot guarantee them legal and investment security "until all dubious relations in the relevant ministries have been cleared up."
"This is a disgrace for this country. It undermines the idea of investment and exacerbates the already bad economic situation in Croatia," he said.
Jakovcic phoned in on a Croatian Television current affairs talk show on Tuesday night to say that preservationists from the Culture Ministry had already stopped projects at a dozen sites, stressing that someone should resign for such behaviour.