Two former French prime ministers, Alain Juppé and François Fillon, clashed late Thursday over multiculturalism and foreign policy in a TV debate three days ahead of the country's conservative presidential primary run-off.

The stakes were high as the two members of the main opposition Les Républicains party faced off in a final debate, with the winner of Sunday's vote likely to become France's next president, according to opinion polls.

While the two candidates largely agreed on cutting civil servant jobs and lowering taxes on French businesses, they presented contrasting visions of French society.

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