March 25 Moscow concert hall attack

Video footage and still images have appeared on Russian social media that appear to show the violent interrogation of several of the men alleged to have taken part in the deadly terror attack on a concert hall outside Moscow Friday. 

One video appears to show one of the suspects, Saidakrami Rachabalizoda, being held on the ground while having part of his ear cut off by a camouflage-wearing interrogator. Rachabalizoda later appeared in court with a heavily bandaged ear. 

The Grey Zone, a pro-Kremlin Telegram channel, published a still photograph that claims to show the electrocution of one of the detained suspects.

Margarita Simonyan, the editor-in-chief of Russian state propaganda network RT, posted a video that appears to show the interrogation of another suspect, Shamsidin Fariduni, who is shown stammering and shaking as he is questioned by interrogators off camera. Fariduni subsequently appeared in court with a bruised face. 

CNN asked the Kremlin about the “visible signs of violence” committed against the suspects, but spokesperson Dmitry Peskov declined to comment.  

The Russian Investigative Committee says it has established that more people were involved in Friday's Crocus City terror attack beyond the four men alleged to have carried out the attack.

The three individuals are two brothers and their father, Russian state media agency TASS said. Investigators are asking the Basmanny Court of Moscow to choose a preventive measure for the three defendants, the court told TASS.

“Three more materials were received regarding the accused Islomov Aminchon Isroilovich, Islomov Dilovar Isroilovich, as well as the suspect Islomov IsroilIbragimovich,” the court said, according to TASS. Fariduni was one of those detained in Bryansk Saturday. Both Aminchon and Dilovar Islomov appeared in Basmanny court in Moscow Monday. State news agency TASS said that Dilovar Islomov is a citizen of the Russian Federation and works as a taxi driver, citing court documents.

Russian state news agency RIA said Dilovar Islomov “owned the Renault car in which the terrorists fled the crime scene, sold it in February, and the compulsory motor liability insurance remained on him,” citing a source familiar with the situation.

ISIS, also known as the Islamic State group, claimed responsibility for Friday’s deadly assault on a concert venue in Moscow, releasing graphic footage purporting to show its gunmen carrying out what was Russia’s worst terror attack in decades.

Here's what we know about the group:

When was it formed?: ISIS-K was formed in 2015 and has been active in Afghanistan, Pakistan and Iran. It is a branch of ISIS, the terror group that emerged in Syria and Iraq and, at its peak, controlled a huge stretch of territory. Five years since the fall of ISIS’ self-proclaimed caliphate across Iraq and Syria, the group has morphed into a terror network with cells spread around the world, including in Africa, the Middle East, Central Asia and Southeast Asia.

How is it linked to ISIS? The connection between the groups is not entirely clear. The affiliates share an ideology and tactics, but the depth of their relationship – such as the chain of command and control – has never been fully established.

What is its ideology?: Like its parent organization, ISIS-K aims to create a “pure Islamic state,” according to the Center for Strategic and International Studies (CSIS) – describing the group’s vision of a “global, transnational caliphate” governed by Sharia law.

Why attack Russia?: ISIS has a longstanding animosity against Russia and Putin, several experts told CNN. “Russia has been at the top or near the top of the list of ISIS for many years,” said Daniel Byman, director of Georgetown University’s security studies program.

Read more about ISIS-K here.

Four days after Friday's Moscow terror attack, some 200 people gathered at the site of the attack Monday morning, offering condolences to the victims, a CNN team in Moscow reports.

While the crowd was much smaller than the numbers who were at the Crocus City hall on Sunday, a steady flow of people were bringing flowers and stuffed toys to the scene, according to the CNN team. Candles were also laid next to the memorial.

A Russian Red Cross tent is set up at the location to provide psychological help. The CNN team said volunteers are helping people with directions on where to pick up belongings or cars left on Friday. The main entrance of the Crocus hall remains barricaded off, with police buses and emergency vehicles clearing rubble. Search operations are still ongoing.

The victims: Moscow's Department of Health published an updated list of those still hospitalized in the capital's medical institutions after the attack, consisting of 76 names.

At least 137 people died in the attack after gunmen opened fire on people inside the hall, and set fire to the building. Of them, at least three were children. President Vladimir Putin declared Sunday a day of national mourning, vowing to punish the perpetrators and expressing condolences to those who had lost loved ones.

Following the identification of the four men charged with carrying out the attack in Moscow on Friday as Tajik nationals, Tajikistan has reiterated its readiness to fight terrorism together with Russia.

The Russian state news agency TASS published video Monday showing Tajik Prime Minister Kokhir Rasulzoda writing a note in the book of condolences at the Russian embassy in Dushanbe.

State-run RIA Novosti reported on its Telegram channel that Tajikistan is providing assistance to the Russian investigation “in the case of the terrorist attack in Crocus,” citing a source in Tajikistan’s special services. It reported that a source in the Russian Foreign Ministry had confirmed that “Tajikistan specialists are providing assistance to investigators from Russia in connection with the arrest of citizens of the republic in the case of a terrorist attack.”

On Sunday, the Kremlin said that Russian President Vladimir Putin had spoken with his Tajik counterpart Emomali Rahmon, who had expressed “deep condolences and feelings of solidarity with the Russian people in connection with the death of civilians as a result of the vile terrorist attack at Crocus City Hall."

French President Emmanuel Macron said on Monday that it would be “cynical and counterproductive for Russia and her citizens” to try and blame Ukraine for the Crocus City terror attack in Moscow. 

“We must be careful of any instrumentalization” of the attack, Macron said in remarks to journalists upon his arrival in the French territory of French Guiana.

Macron expressed his “solidarity” with the Russian people following the “Islamist terror attack” in Moscow, adding that France had offered its help to Moscow regarding intelligence about the attack.

He noted that ISIS, also known as the Islamic State group, had claimed the attack and that France and its main partners believed it was an Islamic State entity that planned and perpetrated this attack. However, he did not specify which ISIS entity France believes perpetrated it.

Macron said that the same entity had attempted several attacks on French soil in recent months, which contributed to the French government’s decision to raise the country’s terror threat level on Sunday.

Remember: After the attack, Putin said the "perpetrators" were headed to the Ukraine border before being captured. His comments came after ISIS had already claimed responsibility. Ukraine strenuously denied any involvement. 

Kremlin spokesperson Dmitry Peskov has sidestepped questions about whether Friday’s terror attack in Moscow constitutes a failure by Russia’s intelligence services.

On a call with journalists Monday, Peskov was asked whether the attack was "a failure of the intelligence services?"

Peskov responded: “There is currently a lot of emotional, hysterical, provocative content online. Clearly, this monstrous tragedy evokes a lot of emotions, but unfortunately, our world shows that not a single city or country can be completely immune to the threat of terrorism."

"The intelligence services work tirelessly. They are dealing with all the threats, all the challenges that our country faces," he said.

Peskov also said the fight against terrorism required "full-fledged international cooperation" but suggested that cooperation was not happening. He refused to comment on whether any warnings had been received from the United States about the risk of terror attacks in Russia.

CNN reported Friday that there had been a steady stream of intelligence that ISIS-Khorasan was determined to attack in Russia, according to two sources familiar with the intelligence.

In response to a question asking if there was any help provided from Western countries in view of the warnings, Peskov said: "Our [special] services operate independently. There is no talk of any help now," later adding "there are currently no contacts with Westerners now."

CNN's Alex Marquardt contributed to this report.

Kremlin spokesman Dmitry Peskov has declined to comment on reports that the four men alleged to have carried out the attack at Moscow's Crocus City concert hall had been tortured after being apprehended.

Peskov was asked by CNN:

Peskov responded: “No, I leave this question unanswered.”

He also refused to comment on ISIS, also known as the Islamic State group's claim that it carried out the attack.

During a call with journalists Monday, Peskov was asked: “How can you explain the fact that ISIS was not mentioned by the officials among the versions of this terrorist attack?” 

Regarding the claim of responsibility, which was made via the ISIS-affiliated Amaq news agency on Saturday, Peskov said:

Neither President Vladimir Putin nor other senior Russian officials have referred to the claim by ISIS, which included releasing a video of the attack taken by one of the perpetrators.

This post has been updated to include Peskov's response to the ISIS claim. 

Each of the four defendants charged with committing a terrorist act in the Crocus City concert hall attack was brought to court individually in Moscow on Sunday.

They are accused of committing a crime under part 3, provision “b” of article 205 of the Russian Criminal Code (terrorist act), which the Russian Criminal Code states is punishable with up to life imprisonment.

Three pled guilty to all charges, according to state media news agency TASS.

Here's what we know about the accused: