FLORENCE (Reuters) - The EU's antitrust regulator, who has accused Alphabet unit Google of stifling competition in three separate cases, left open the possibility of further action against the U.S. technology giant.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=KEmsE3D_AYQ:SvkQ1ywEWkI:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=KEmsE3D_AYQ:SvkQ1ywEWkI:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=KEmsE3D_AYQ:SvkQ1ywEWkI:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=KEmsE3D_AYQ:SvkQ1ywEWkI:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=KEmsE3D_AYQ:SvkQ1ywEWkI:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/KEmsE3D_AYQ" height="1" width="1" alt="" />