Alexander Bortnikov, head of the Federal Security Service, warned that 5,000 fighters from ISIS had been deployed in northern Afghanistan.
The White House released a statement encouraging respect for "freedom of expression and freedom of the press."
"If you killed the 50 loudest Leftists in the United States, especially if you didn't get caught, and continued killing, these people would shut their stupid f**king a**hole mouths."
The long-time journalist and broadcaster told CNN the president's social media output was "ridiculous, but...unrelenting."
"In Russian legal terms even satire can be treated as propaganda," said Mikhail Bogdanov, director of "Deadplay" publisher Komilfo.
Louisa Vesterager Jespersen and Maren Ueland were found stabbed to death in a remote mountain camp site Monday.
The case has been initiated against 44-year-old Sergey Ledenyov in the far eastern Kamchatka region.
The bomber died and three employees were injured by the blast, which investigators are treating as an act of terrorism.
Several of the group's radicalized members were set for release when the organization was uncovered.
The author warned a German publisher "the time is not far distant when a German name will no longer be a source of pride."
The people in the car were allegedly taking drugs and made Islamophobic comments before driving into a crowd of Muslims.
Support for authoritarian governments is likely to foment extremist resistance in fragile states, new analysis argues.
Nine men and one woman were charged with terrorist conspiracy following the arrests.
Patriarch Kirill has repeatedly praised Putin, calling his presidency a "miracle of God."
Extremists' use of technology is a persistent threat, experts warn.
Trump didn't fact-check his retweets of far-right British politician Jayda Fransen, and didn't even know who she was, Sarah Huckabee Sanders said.
The attack proved once again that insurgents can carry out deadly assaults in the heart of the Somali capital.
Saudi Arabia's crown prince says he wants to make the country more moderate. But is he fighting extremism just to attract investment?
The device was packed with more than a kilogram of shrapnel.
The accusation is the latest sign of rising tensions between Moscow and Washington.
Filipino jihadis wanted to cause the "next 9/11."
Moscow denied the report announced via the radical Islamist group's Amaq News Agency.
Until the last minute, most passengers believed the hijacking was for real.
The Belgian Foreign Ministry had to intervene to get some of the men into the U.S.