Watch Chiefs and Raiders fans brawl in stands at Arrowhead Stadium

FILE -- After the Kansas City Chiefs' 21-13 win over the Oakland Raiders couple years ago, fans fought in the stands at Arrowhead Stadium. Thursday, furious Raiders fans vent after 49ers rout Oakland on national TV.
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FILE -- After the Kansas City Chiefs' 21-13 win over the Oakland Raiders couple years ago, fans fought in the stands at Arrowhead Stadium. Thursday, furious Raiders fans vent after 49ers rout Oakland on national TV.