MOSCOW (Reuters) - Russian President Vladimir Putin said on Thursday that law enforcement agencies must take tough action against persons and groups using the Internet for extremist ends.  The security of Russia s Internet must be heightened, we must fight against those using the information space to spread extremist ideas,  Putin told a meeting of Russia s Security Council.  At the same time, I would like to stress that there can be no talk about restricting access of law-abiding citizens to the worldwide web, about any pervasive barriers and filters,  he said. 
Russia's Putin urges tough action against online extremism