The NATO-led Stabilisation Force (SFOR) conducted "unannounced inspections there," a SFOR spokesman told AFP without specifying which sites had been targetted.

According to a television press report, 20 SFOR vehicles were involved in the five-hour operation that ended at 15:00 pm (1300 GMT).

As well as the army barracks and intelligence offices, soldiers also raided offices belonging to Bosnian Serb Telekom, the electricity company Elektroprivreda and a local radio station, the report aded.

The 12,000-strong SFOR has been keeping the peace in Bosnia since the end of the 1992-95 war.

Postwar Bosnia has two semi-independent entities -- the Serb-run Republika Srpska and the Muslim-Croat Federation.

WAR.WIRE