Anti-gay marriage protestors clash with riot police in Paris The youths shouted slogans against the government such as "Socialist dictatorship" and also threw objects at journalists covering the event. Late Saturday, police had detained 50 people involved in an anti-gay marriage protest on the busy Champs-Elysees avenue. Fears of unrest at Sunday's protest had been fuelled by violence that erupted earlier this month during celebrations marking football club Paris Saint-Germain's league victory that saw tourists attacked and shop and car windows smashed. Some 4,500 security forces were mobilised for Sunday's demonstration that was billed as a last-ditch show of force by opponents of the bill allowing same-sex marriage and adoption, which was voted into law on May 18 following months of bitter protests. Interior Minister Manuel Valls had warned that so-called "ultras" - many of them far-right nationalists - were expected to infiltrate the protest and cause unrest, and advised parents not to bring their children with them. But those in the protest ignored the recent tensions, bringing their children along as others had in previous demonstrations. "We keep hearing about a far-right movement, I can see only families here," said one man called Raoul, who came from the city of Dijon. Onlookers were instead treated to creative forms of protest. One man dressed in black held a scythe and wore a mask of Hollande as he stood behind a coffin in which lay a mannequin dressed as Marianne, the emblem of France. "Hollande, your mother isn't called Robert," shouted some of the demonstrators in a slogan that gained in popularity as the afternoon progressed. Supporters and opponents of the bill began protesting last autumn when it was adopted by the cabinet, and continued to do so at regular intervals throughout the country during the legislative process. One of Hollande's campaign pledges, it has proved hugely divisive in a country that is officially secular but predominantly Catholic. France is the 14th country to legalise same-sex marriage, an issue that has divided opinion in many other nations too. In Brazil, for instance, tens of thousands of evangelical Christians marched in Rio de Janeiro on Saturday protesting a recent legal ruling allowing gay marriage. And in Poland, some 10,000 protesters marched Sunday in solidarity with the French, to defend the traditional family structure. But according to a survey published in the Journal du Dimanche, nearly three-quarters of French people are tired of the anti-bill protests and think they should stop.