Extremist youth groups exist in almost all of Russia's regions, Deputy Prosecutor General Alexander Buksman said on Wednesday.
In comparison with 2009, the number of extremist events grew by 20 percent, Buksman said at a meeting with the presidium of the national council of lawmakers and the united commission for national policies.
Low employment and social stratification generate this situation, he said.
Speaking about Saturday's riots in Moscow's downtown Manezh Square, Buksman emphasized that "those who disseminate extremist ideology" have made the best use of the Internet.
Violent riots broke out in Moscow and St. Petersburg on Saturday as police dispersed protests in both cities against the killing of a Moscow football fan.
Yegor Sviridov, 28, was killed last week during a brawl in northern Moscow between football fans and migrants from the North Caucasus.
About 30 people were injured in Moscow's riots, which took place on Manezh Square and involved some 5,000 people, mostly football fans and members of nationalist movements. The riots sparked a new wave of interethnic enmity in the capital, home to hundreds of thousands of working migrants from the volatile North Caucasus region. RIA Novosti
