The Croatian President, Franjo Tudjman, has called a meeting of his country's security council to discuss an operation by the NATO-led peacekeeping force in Bosnia-Hercegovina in a disputed border town.
The force expelled Croatian police and transferred the town, Martin Brod, to the jurisdiction of the Muslim-Croat Bosnian Federation.
Mr Tudjman condemned the move, saying it was hasty and could have harmful consequences.
The senior international envoy to Bosnia, Carlos Westendorp, said he ordered the peacekeepers to act because Croatia had not kept its promise to withdraw its police from Bosnian territory.
From the newsroom of the BBC World Service