All over Russia, national flags are lowered, television channels do not broadcast commercials and entertainment programs.
From 1993 to the tragedy in "Crocus City Center", the day of mourning was declared 29 times, including after terrorist attacks in 2002 and 2004, but also in cases of other accidents - airplane or natural disasters.
The last time the day of mourning was declared was in 2018, when 60 people, mostly children, died in a fire in an entertainment center.
All over Moscow, there are billboards with images of candles and on which the day of the tragedy is written, and the citizens of Moscow are invited not to go out or go to places where large numbers of people gather.
During the clearing of the ruins in the "Crocus City" concert hall, more lifeless bodies were found, the press service of the Investigative Committee announced, and TASS reports. The number of confirmed victims has risen to 133.
The investigative committee added that it is looking for possible additional victims terrorist attack continues.

Moscow_assassination_28Fire after the terrorist attack in the shopping center in Moscow / Photo: Vasili Petrović/Tanjug
The Ministry of Health of Moscow announced a little earlier that 152 citizens were injured in the terrorist attack, of which 114 were hospitalized.
"In the terrorist attack, 133 people died, including three children, and 114 people, including 4 children, were transferred to medical facilities and hospitalized," according to the announcement of the Russian Ministry of Emergency Situations for the Moscow region, reports TASS.
The teams of the Ministry of Emergency Situations continued to clear the terrain around the location of the terrorist attack, and during the night heavy machinery was also engaged.
The Islamic State released a video that it claims is a video of the attack in Moscow
Last night, the terrorist organization Islamic State published a video that it claims is the footage of the attack on the Crocus City shopping center in Moscow.
The video lasts a minute and a half and shows armed men opening fire on several people entering the concert hall, reports Reuters.
On Friday, the Islamic State claimed responsibility for the terrorist attack that killed 133 people and injured more than 150.
On the other hand, the editor-in-chief of "Rasia Sevodnja" Margarita Simonyan stated that the Russian authorities have already determined who participated in the terrorist attack and added that it was not the Islamic State.
"These are Ukrainians." And that is why, before these people were arrested, Western special services claimed that the attackers were from ISIS. That betrayed them," said Simonyan.
Moscow: Citizens also come at night to pay their respects to the victims of the attack in Crocus
Citizens continue to flock to the Crocus City Hall concert hall outside Moscow to pay their respects to those killed in Friday night's terrorist attack.
At the Krokus City Hall shopping center in Krasnogorsk, people came even last night to pay their respects to the victims, and the reporter of the newspaper Izvestia stated that even at four in the morning there were people who came to pay their respects to the victims of the attack.
The video shows people leaving flowers, toys and balloons near the building where the attack took place.
Several fire engines, as well as the police, are still on the scene, according to the newspaper Izvestia.