While French presidential candidates Emmanuel Macron and Marine Le Pen courted voters at rallies, hundreds of masked May Day protesters marched along Boulevard Beaumarchais in Paris on May 1, engaging in scuffles with local police and security.This video footage shows tear-gas canisters being volleyed back and forth between protesters and police, while French media reports said at least four policemen were wounded after protesters began throwing Molotov cocktails and stones at nearby riot police.