The underage accused are all between 14 and 17, and are suspected of murder or conspiracy to murder. They were remanded in a young persons' detention facility for one month pending further investigations.
"The 'guardians' of free speech have in all seriousness allowed users of their social media to wish death upon the Russian military," Medvedev, who served as president from 2008 to 2012 and is now deputy secretary of Russia's Security Council, wrote on the messaging app Telegram.
April 8 (Reuters) - A missile fired from Ukrainian-held territory was shot down over the Black Sea town of Feodosia in Russian-controlled Crimea, the Moscow-installed head of Crimea's administration said on Saturday.
The International Committee of the Red Cross said this week it had been in contact with Lvova-Belova, the first confirmation of high-level international intervention to reunite families with children who were forcibly deported.
Russia forcibly annexed Crimea from Ukraine in 2014 after a pro-Moscow president was toppled amid mass street protests.
Kyiv has vowed to recapture the Black Sea peninsula along with all other Ukrainian territory occupied by Russian forces.
Outraged that Meta Platforms was allowing social media users in Ukraine to post messages such as "Death to the Russian invaders," Moscow blocked Instagram this week, having already stopped access to Facebook because of what it said were restrictions by the platform on Russian media.
Law enforcement suspect that the daughter and boy then conspired to order two other teenagers to kill her mother for 350,000 roubles (£3,650) which the girl intended to obtain from Anastasia's savings.
Both players held serve throughout the third set until the tiebreaker, when Ruud went up 3-0 by breaking Halys twice. Ruud won one of the next two points on his serve to go up 4-1.
Halys held serve to pull within 4-2, but Ruud broke his serve again and served out the match.
In Sunday's final, Carballes Baena -- who has one ATP tourney win, the Ecuador Open in February 2018 -- will take on Alexandre Muller.
The Frenchman defeated Pavel Kotov of Russia 7-6 (3), 7-5. Muller has yet to win on the ATP Tour.
Anton Gorelkin, a member of Russia's State Duma committee on information and communications, pointed Russians to services that would help them move videos from YouTube to the domestic equivalent, RuTube.
ICRC spokesman Jason Straziuso said the organization was in contact with Lvova-Belova "in line with its mandate to restore contact between separated families and facilitate reunification where feasible."

Mykola Kuleba said at a news conference in Kyiv that the children were expected to arrive in the capital later in the day.
Kuleba is the executive director of the Save Ukraine organization and is the presidential commissioner for children's rights.
March 18 (Reuters) - Russia on Friday demanded that Alphabet Inc's Google stop spreading what it called threats against Russian citizens on its YouTube video-sharing platform, a move that could presage an outright block of the service on Russian territory.
The regulator, Roskomnadzor, said adverts on the platform were calling for the communications systems of Russia and Belarus' railway networks to be suspended and that their dissemination was evidence of the U.S.
Former Russian President Dmitry Medvedev on Friday wrote a fierce criticism of foreign social media firms, mentioning by name both Meta and YouTube, but he hinted that the door leading to their possible return to the Russian market would be left ajar.