NATO-led peacekeepers have confronted stone-throwing Serbs seeking to prevent the international troops from removing their roadblocks in the tense north of Kosovo, according to AP. Serb officials said at least three protesters were injured in the incident early Friday at a bridge near the town of Zvecan. NATO troops have blocked the bridge with armored vehicles and barbed wire as they moved to remove nearby concrete roadblocks set up by the Serbs. This triggered protests from an angry crowd of Serbs, which gathered by the checkpoint and started throwing rocks at NATO troops. Witnesses said NATO responded by firing rubber bullets. The incident fuels tensions in Kosovo's volatile north where Serbs have refused to accept Kosovo's independence from Serbia, and have set up roadblocks to prevent Kosovo's government to extend control.