NATO’s secretary general on Monday pledged the military alliance’s “unwavering” support for Bosnia’s territorial integrity after a series of Bosnian Serb separatist moves raised tensions nearly 30 years after the end of a bloody war.

Visit to Sarajevo comes after Bosnian Serb leaders bar federal judicial authorities and police from Republika Srpska.

NATO fully supports Bosnia's territorial integrity and political leaders should resolve tensions that have been fuelled by a jail sentence imposed on the president of the Bosnian Serb region, the alliance's Secretary-General Mark Rutte said on Monday.

NATO will not let a security vacuum develop in Bosnia and Herzegovina at this time of crisis but political leaders should work together to resolve problems, NATO Secretary-General Mark Rutte said on Monday.