Lille, France: So called 'Twitter bots' that masquerade as real people and spread fake news and propaganda on social media have been detected in action in France in the lead-up to this weekend's presidential election.However, French voters are sharing much better quality information online than what many US voters shared in last year's presidential election, according to an analysis released on Saturday by a group of experts from Oxford University. France attack raises new questions over election The killing of a policeman in an Islamist militant attack overshadows the last day of France's unpredictable presidential election campaign as centrist Emmanuel Macron holds onto his status as frontrunner in the polls.