WARSAW - Riot police in the Polish capital used truncheons and rubber bullets on Sunday to break up a crowd of right-wing extremists who pelted them with firecrackers and lumps of concrete at a parade to mark the national holiday.

It was the second year independence day celebrations have degenerated into violence, underlining the gulf between the government and hardline nationalists who think liberal values imported from Europe are ruining Poland's Catholic traditions.

Police told Reuters that 132 people were detained following the violence, which took place in central Warsaw. Five policemen sustained injuries that needed hospital treatment.

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