Asked by reporters to comment on Mravak's arrest on Friday morning, Josipovic said he expected the police and the office of the chief state prosecutor (DORH) to thoroughly investigate this case just as any other one.
"Croatia is committed to the struggle against corruption and organised crime, regardless of where it is located -- in economy or politics," Josipovic said while attending a reception in the parliament on the occasion of the 65th anniversary of the victory over Fascism.
Parliament Speaker Luka Bebic declined to comment on the ongoing investigation into Mravak, citing the division among three branches of power.
Mravak, former CEO of the state-owned power supply company HEP, was taken to a police station for questioning on Friday after the police searched his flat in Zagreb earlier in the morning.
According to the media, Mravak is suspected of harmful contracts and losses caused in 2007 and 2008, when HEP bought electricity at international tenders at the highest prices, only to sell it at considerably lower prices to the Sibenik-based TLM metal company, which gave it to the Aluminij company from Mostar, Bosnia-Herzegovina. In this way, HRK 100 million was embezzled from the state budget.
Neither police nor the national anti-corruption investigative agency (USKOK) said what Mravak was charged with.