"They are often mainly organised from abroad, organised in different ways - either the information comes from there or the money," Putin said. Prosecutors should fight extremism "more actively", Putin said.
Just days after ordering the invasion of Ukraine, Putin signed a law that imposes a jail term of up to 15 years for spreading intentionally "fake" news about the military.
Russia says the Western media have provided an excessively partial narrative of the war in Ukraine that largely ignores Moscow's concerns about the enlargement of NATO and what it says is the persecution of Russian speakers in Ukraine.
Russia's Feb. 24 invasion of Ukraine has killed thousands of people, displaced millions more and raised fears of a wider confrontation between Russia and the United States - by far the world's two biggest nuclear powers.