"I am the first to do it... I expect my fellow citizens to be treated the same way by the leaders of other countries," said Tadic, who was taking part in a regional energy summit.
Speaking in the Croatian Television talk show "Nedjeljom u dva", Tadic apologised to "all the members of the Croatian people whom someone made unhappy in the name of my people."
Tadic said he was making the apology as president and recalled that in the past there had been similar examples of statesmen apologising for crimes committed by members of their peoples.