French officials on Sunday strongly condemned anti-Semitic abuse and anti-police attacks by some "yellow vest" demonstrators as up to 2,000 of them gathered in central Paris to embark on a third month of the anti-government protests.

Thousands of France's "yellow vest" demonstrators were expected to take to the streets again on Saturday, a month after the start of their protest movement which has plunged President Emmanuel Macron's government into its biggest crisis.