The Bosnian Serb leader who is pushing for independence for the Serb region of Bosnia says the country's central institutions are "useless" and Bosnian Serbs should form their own intelligence service.

Milorad Dodik said Tuesday morning the Bosnian Serbs have the right to "defend themselves." The previous evening, a Bosnian Muslim gunman killed one police officer and injured two after he stormed into a police station in the northeastern town of Zvornik, in the Serb part of the country, shouting "Allahu akbar," or God is great.

The attack has instantly raised tensions in Bosnia, a country still fragile 20 years after the end of the war between its Christian Orthodox Serbs, Muslim Bosnians and Catholic Croats that left 100,000 people dead and divided the country along ethnic lines.