Police clashed with left-wing demonstrators in Paris on Sunday shortly after projections from the France's presidential elections showed far-right leader Marine Le Pen had made it to a runoff vote.

Police moved in on the demonstrators, some of whom threw bottles and firecrackers, an AFP journalist saw. Three people were arrested, according to police.

Several hundred young people rallied in the Bastille square - the historic site where the 1789 French Revolution began - after projections suggested Le Pen would contest the second round against Emmanuel Macron, a centrist and former banker.