Saturday, people presented flowers outside the attacked concert hall to express their commemoration.

Half the flag, cancel public activities, TV station update show tables ... Russia held a mourning day for the 133 deceased in the Moscow attack on Friday evening in Moscow.

Earlier, Russian President Vladimir Putin said all four gunmen who launched fatal attacks in a concert hall in the outskirts of Moscow had been arrested.The Russian authorities said that a total of 11 people were detained and four gunmen were arrested on the way to Ukraine.The Islamic State (IS) organization claims to be the behind -the -scenes ambassador of the attack.

The attacker rushed into the building. There was no difference to shoot and ignited the building, causing at least 133 people to die and more than 140 people injured.

On Saturday, the Islamic State (IS) tested posted a photo of four masked men on its own Telegram channel, and they claimed to participate in the attack.Russia did not comment on it.

The organization subsequently announced a very clear attack process video.The BBC has verified the authenticity of this video, and a gunman in the picture fired to multiple people.BBC will not play this video.

Putin condemned the worst massacre of Russia in the past 20 years in the TV speech, calling it "barbaric terrorist act" and reiterated the attacker proposed by the Russian security department earlier.Ukraine's statement.

Kiev's rejection of Ukraine's claims to some extent the attack, calling it "ridiculous".

Ukrainian Military Intelligence Agency spokesman Andriy Yusov said to BBC: "If the suspect is going to Ukraine, it means that they are stupid or have suicide."

Ukrainian President Zelei Sky accused Putin accused Putin trying to "blame" Ukraine.He said in a speech at night: "This is not a Putin who does not deal with Russian citizens, does not speak to them, but is silent for a day -thinking about how to blame all this on Ukraine."

The National Security Council stated that earlier this month, the agency warned that there may be potential attacks on Moscow's "large rally" (including concerts).The Kremlin was at an attempt of "propaganda" and Washington's recent elections in Russia.

Saturday, the White House condemned the "ingenious" attack and described Islamic State as "the common horror enemies must be defeated in various places."

The auditorium of the Crocus City Hall is shining outside the auditorium.

Paul Kirby restores the details of the attack.Please note that some details and pictures in this article may be disturbing.

In less than eight o'clock, the auditorium of the Crocus City Hall is full of people, because the old rock band "Picnic" on Friday night will hold a rock concert here.

Photographer Dave Primov said: "Some people in brown clothes, I don't know who they are -terrorists, soldiers, or other people -Fighting to people at the assault rifle. "

Gunners just walked outside the lobby outside the theater, and began to shoot at will, killing and injury to the public who was entering the theater.

About 6,200 tickets were sold at the concert, but security personnel outside the entrance soon disappeared.One of the four guards said that his colleagues hid behind a advertising board: "Those attackers passed by 10 meters away from us -they started randomly at the people on the first floor."

No one knows how many attackers.However, the screen taken upstairs showed that the four men walked separately on the beige marble tile floor, and the distance between them was only a few meters.

The gunner enters the concert hall

The leader of the leader was aimed at the people squeezed by the window at a close distance.They have become the first victims of the most fatal attacks launched by Russia for many years against civilians.

Many dead and wounded people are from other towns near the edge of northwest edge of Moscow, Krasnogorsk, Khimki, and Moscow.

The second attacker later joined, and the third attacker followed with a backpack calm behind.The fourth person handed him the weapon, and then they passed through an unmanned metal detector and went to the auditorium.

A woman was carrying her 11 -year -old daughter to buy ice cream at a cafe near the entrance. They heard the sound and someone shouted "lying down".

Her Russian reporter: "We rushed to the child, lay down, and began to use tables and chairs to set up obstacles. Several injured people ran to us."

In the theater, the concert will start after a few minutes. Some people think that noise may be part of the performance.

Sofikiko Kvirikashvili initially thought it was "some kind of endless firecracker -I turned around in the hall and turned around. The third time, the third time.I found that everyone in the hall began to run away. "

Dave Primov said the scene was crowded and panic.Some people in the theater tried to lie between the seats, but as several gunmen fired in the seat, there was almost no protective effect.

Those audiences who can go to the stage go to the stage.Others tried to find a higher exit, but found that some doors were locked.Witnesses said that there were elderly people and children at the scene, and they were all shot without difference.

A woman ran to the stage at a high place at the time and saw a man shot on the stage: "We ran behind the curtain, and a employee in the Cross Auditorium wearing a uniform told thatWe ran, and we ran to the parking lot without wearing any winter clothes. "

Margarita Bunova, as soon as I got the show, was ready to watch the performance, she heard the sound of her thought of firecrackers, and then turned into a rapid burst.That's the sound of gunfire.

"Some people say that running downstairs quickly, and then dark ... When we came out, we could still hear the sound of gunfire behind us."

Image source, AFP

Survivors tell the panic in the building when people try to escape.

A man in the VIP box tells how he and other people set up obstacles in the box, but found that the thick smoke in the theater was rolling.

Another man Vitaly saw the attack from the balcony: "They throw some gasoline bombs, everything is burned."

No matter whether the gunman throws gasoline bombs or other combustion devices, the fire is spreading rapidly.

Because the attacker was shooting, the firefighters could not approach the building.The fire quickly spread to the roof, and the entire Krasnogorsk (KRASNOGORSK)Fire light can be seen in the skyline.Some roofs collapsed, and the fire spread to the front of the building, and the two floors on the top were burned.

image source, vasily prudnikov/ePA-EFE/Rex/Shutterstock

Many people in the auditorium escaped from the hall.A video with a strong sense of picture shows that people rush off the escalator and pass through two corpses supported by the sofa.

Another video shows that when people escape, they echoed the crackling guns around.They fled behind a relatively safe building. Some people curled up there, while others helped each other through the corridor.

The surveillance video shows a mess in front of the stage.There is no trace of Russian police or special forces in the building.

The survivors climbed the stairs and fled to the back door of the Crookus City Hall.Someone saw that a man was retching, and others called their loved ones, and the man walked away.

Eva is an assistant to the dance troupe. When the attacker rushed into the auditorium, she was in the background."We were in the dressing room at the time, a group of people rushed from us. We heard noise in the corridor, and some people were running; we picked up our coat and ran away with the crowd."

Initially, all members of the "Picnic" band were announced safely, but later there were unknown reports that the whereabouts of the musicians were unknown.

As the number of deaths exceeds 100, the number of injuries exceeds 200, the scale of the massacre and the abuse of innocent nature have become clearer inside and outside the auditorium.The first official casualties show that the oldest victims were in their 70s, and there were children among the dead and injured.

Source, ostorozhno novosti via Reuters

The Russian authorities said that the attacker escaped from the Krasenorsk attack scene by the car.

A photo of a white Renault car related to social media related to Russian security agencies, there are two passengers on the car.

The Islamic State "Islamic State" said in a brief statement that he was the behind -the -scenes command of the attack, but there was no specific explanation which affiliated branch.This coincides with the US intelligence agency's statement, and intelligence shows that Islamic State wants to attack Russia.Two weeks ago, the United States warned that there may be attacks against Moscow's "large rally", but Russian officials complained that information lacks specific details.

Ukraine quickly denied participation and insisted that his attack was limited to the battlefield.

But the Russian Federal Security Agency (FSB) claimed that the murderer tried to cross Russia into Ukraine and there were "related contacts" there.The Russian Federal Security Agency said that many people have been detained, including four suspected attackers.

Margarita Bunova and her husband Pavel said that the first thing they did when they returned home was to embrace their children.

Until Saturday afternoon local time, President Putin spoke to the Russian public, talking about the grief of the entire nation.

He compared the murderer with the Nazis during World War II, and said that no one could undermine Russia's unity.He added that Sunday will be a national mourning day.