UPDATE 4-Striking unions battle Macron in pensions showdown <!-- no image --> <div>* Riot police fire tear gas at protesters in Nantes (Adds rail workers, metro staff vote to extend strike)<div class="feedflare"> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=SgpdapvxgAc:Dlf_s2I8ReA:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?d=yIl2AUoC8zA" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=SgpdapvxgAc:Dlf_s2I8ReA:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=SgpdapvxgAc:Dlf_s2I8ReA:V_sGLiPBpWU" border="0"></a> <a href="http://feeds.reuters.com/~ff/reuters/UKBankingFinancial?a=SgpdapvxgAc:Dlf_s2I8ReA:F7zBnMyn0Lo"><img src="http://feeds.feedburner.com/~ff/reuters/UKBankingFinancial?i=SgpdapvxgAc:Dlf_s2I8ReA:F7zBnMyn0Lo" border="0"></a> </div><img src="http://feeds.feedburner.com/~r/reuters/UKBankingFinancial/~4/SgpdapvxgAc" height="1" width="1" alt=""></div> Posted by Reuters