There have been violent scenes in the historic streets of Florence.<br /><br /> Demonstrators clashed with riot police in the Italian city on Saturday.<br /><br /> One officer was reportedly left with an injured leg in the clashes.<br /><br /> Police used shields to block young men who were charging them in an attempt to reach a building where Prime Minister Matteo Renzi was at a political meeting.<br /><br /> They were from a larger group of anti-government protesters whose march was timed to coincide with Renzi’s visit.<br /><br /> The demonstration aimed to show opposition to a constitutional referendum that Renzi has called for December the 4th.<br /><br /> He says the changes are much-needed reforms.<br /><br /> But opponents fear they will lead to an excessive centralisation of power.<br />
