Scuffles between police and protesters outside Le Pen rally in Paris

Tear gas floats in the air as people protest outside the venue of a campaign rally for Marine Le Pen, French National Front (FN) political party leader and candidate for French 2017 presidential election in Paris, France, April 17, 2017. REUTERS/Philippe Wojazer

PARIS (Reuters) - Far-right leader Marine Le Pen on Monday sought to mobilise her supporters six days ahead of France's most unpredictable presidential election in decades by pledging to suspend all immigration and shield voters from "savage globalisation."

Opinion polls have for months shown Le Pen and centrist Emmanuel Macron qualifying next Sunday for the May 7 run-off, but the gap with conservative Francois Fillon and far-leftist Jean-Luc Melenchon has been tightening.