ROME-- Italy has condemned the terror attack at a suburban Moscow concert hall and stepped up security at key transportation, cultural, and religious sites across the country.

The terror attack on Friday killed at least 133 people and injured over 100, the Investigative Committee of Russia said Saturday.

Calling the attack "the massacre of innocent civilians," Italian Prime Minister Giorgia Meloni said "the Italian government firmly and totally condemns this brutal act of terrorism."

In a statement, Italian President Sergio Mattarella said the world stands united behind the victims of the attack, calling on the international community to fight terrorism.

Italy's Ministry of the Interior said on Saturday that it has ordered the security level at "sensitive" sites to be raised in Rome and other cities, including airports, train stations, as well as key cultural and religious sites.

The ministry also said that it will hold a special meeting on Monday to analyze potential risks after the Moscow attack.

MOSCOW -- Russian President Vladimir Putin on Saturday called a terrorist attack here bloody and barbaric, vowing retribution for the perpetrators, organizers and financiers.

Putin made the remarks during a televised address to the nation after a deadly shooting Friday evening at the Crocus City Hall in northwest Moscow claimed the lives of at least 133 people.

Putin said all four perpetrators of the terrorist attack were arrested, adding that all perpetrators, organizers and financiers of this crime would be punished.

"Whoever they are, whoever guides them. I repeat, we will identify and punish everyone who stands behind the terrorists, who prepared this atrocity. This is a strike against Russia, against our people," Putin said.

The Russian president added the terrorist attack was "carefully, cynically planned," and "a prepared mass murder of civilians."

He also said that the perpetrators tried to hide and moved towards Ukraine, and according to preliminary information, a "window" was prepared for them from the Ukrainian side to cross the border.

Earlier, advisor to the head of the Ukrainian Presidential Office Mikhail Podolyak and the Ukrainian Foreign Ministry both rejected the notion of Ukraine's involvement in the attack.

Putin added that the main thing now is to prevent those who were behind the terrorist attack from committing new crimes.

He noted that the Federal Security Service and other law enforcement agencies are working to identify the entire "terrorist support base."

Putin also declared March 24 a day of national mourning in Russia for those killed in the terrorist attack.

MOSCOW -- Russian President Vladimir Putin said Saturday all four gunmen in the Moscow terrorist attack were arrested.

Putin, addressing the nation, said that all those responsible for the deadly attack would be punished. He also ordered that Sunday will be a nationwide day of mourning.

A deadly shooting at a concert hall in suburban Moscow Friday killed at least 143 people and injured over 100, local authorities said.

Russia Today has posted a video clip of the interrogation of one of the suspected terrorists behind Friday's shooting spree at Crocus City concert hall near Moscow.

Earlier on Saturday, Russia's FSB security service confirmed that 11 suspects, including four of the alleged perpetrators, had been detained in Bryansk Region, not far from the Ukrainian border, RT reported.

The footage shows a bearded man lying on the ground and describing in broken Russian how he'd been paid to commit the terrorist attack.

The suspect added that he had committed the crime "for money," detailing that he had been promised 500,000 rubles ($5,418).

The alleged perpetrator claimed that half the sum had already been transferred to his debit card, the report said.

Putin says four attackers of Moscow terror attack arrested.

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MOSCOW -- The death toll from Friday's terrorist attack has risen to 143 after gunmen stormed a concert hall in Moscow, Margarita Simonyan, editor-in-chief of RT broadcast said Saturday.

MOSCOW -- Death toll has risen to 115 people in Friday's terrorist attack after gunmen stormed a concert hall in Moscow, the Investigative Committee of Russia said Saturday.

Emergency services were clearing the rubble at the terrorist attack site -- the Crocus City Hall in Moscow Oblast -- as more bodies were found, the committee said.

Following a preliminary inspection, the committee said the terrorists used automatic weapons, along with ammunition that they had left behind in the concert hall.

The committee added that ballistic, genetic and fingerprint examinations are being carried out.

It has also been established that the terrorists used flammable liquid to start a fire on the premises, it said.

Four suspects were detained in the Bryansk region near the border with Ukraine, the committee noted.

The Chinese Foreign Ministry extended condolences on Saturday over the deadly Moscow concert hall terror attack and offered sympathies to the injured and bereaved.

China is deeply shocked by the heavy casualties inflicted by the severe terrorist attack, a spokesperson for the ministry said in an online statement.

China opposes all forms of terrorism, strongly condemns terrorist attacks, and firmly supports Russia in safeguarding its national security and stability, the spokesperson said.

MOSCOW -- Russia's Federal Security Service has informed President Vladimir Putin about the detention of 11 people, including four who were directly involved in the terrorist attack at the Crocus city hall concert venue Friday night, RIA Novosti reported Saturday, citing the Kremlin.

MOSCOW -- Two alleged suspects in the terrorist attack in the Crocus City Hall in Moscow region have been detained, TASS news agency reported, citing head of the State Duma Committee on Information Policy Alexander Khinshtein.

A shooting rampage occured in a concert hall near Moscow on Friday.

Ren Qi, China Daily reporter based in Moscow, provides more details from the site of the attack.

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PARIS - French President Emmanuel Macron "strongly condemns the terrorist attack claimed by the Islamic State" that left at least 60 people dead and over 100 injured in a Moscow concert hall on Friday, according to the Elysee Palace.

"France expresses its solidarity with the victims, their loved ones and all the Russian people," the presidential office said.

"The images from Moscow tonight are horrifying. Our thoughts go to the victims and to those injured as well as to the Russian people. All effort has to be made to determine the causes of these heinous acts," the French Foreign Ministry said on Friday on X, formerly Twitter.

Over 60 people have been killed after gunmen attacked a concert venue on the outskirts of Moscow on Friday, as reported by Russian authorities.

Over 100 people sustained injuries, with many in critical condition.

Russian authorities have initiated a criminal investigation into the terrorist attack. The Islamic State group has claimed responsibility.

MOSCOW - Following the terrorist attack in Moscow's Crocus City Hall, the Russian Ministry of Culture on Saturday announced cancellation of all mass and entertainment events at federal cultural institutions for the coming days, the ministry's press service said on Saturday.

"Mass and entertainment events at federal cultural institutions are canceled for the coming days," it said.

The ministry also expressed condolences to the families and friends of those killed in Crocus City Hall.

At least 40 people were killed and more than 100 injured after a shooting at the Crocus City Hall concert venue in the northwest of Moscow on Friday, according to preliminary data from the Russian Federal Security Service.

UNITED NATIONS - UN Secretary-General Antonio Guterres strongly condemned Friday's terrorist attack in Russia, said his deputy spokesman.

The secretary-general condemns "in the strongest possible terms" the terrorist attack at a concert hall outside Moscow, in which at least 40 people were killed and over 100 others injured, said Farhan Haq, the deputy spokesman, in a statement.

The secretary-general conveys his deep condolences to the bereaved families and the people and the government of Russia, and wishes those injured a speedy recovery, said the statement.

[Video/Viory]

MOSCOW -- More than 60 people have been killed in Friday's terrorist attack in Moscow's Crocus City Hall, according to the Investigative Committee of Russia (ICR).

"It has been initially confirmed that more than 60 people died as a result of the terrorist attack. Unfortunately, the number of victims may increase," said the ICR on Saturday.

The ICR said that its investigators, criminologists and experts are working together on the ground with the operational units of the Ministry of Internal Affairs and the Federal Security Service.

"The bodies of the deceased are being examined. Material evidence, including weapons and ammunition, is being confiscated from the crime scene, all necessary examinations are being ordered and are already being carried out, including genetic, ballistic, and fingerprint testing," it added.

According to the list of injured persons released by the health department of the Moscow Oblast, there are many children among them. Local governments are calling on residents to donate blood.

Following the terrorist attack, Moscow Mayor Sergei Sobyanin announced that all mass gatherings in the city would be canceled this weekend. In addition to Moscow, the Leningrad Oblast, Arkhangelsk Oblast and several other places announced the cancellation of all entertainment, cultural and other public activities.

Russian railways, civil aviation and other departments have issued statements that they will tighten security inspections.

MOSCOW -- A total of 115 people were hospitalized as a result of the terrorist attack in Moscow's Crocus City Hall, including five children, Russian Health Minister Mikhail Murashko said on Saturday.

"We hospitalized 115 people, five of them are children. One child is in serious condition," he said.

At least 40 people were killed and more than 100 injured after a shooting at the Crocus City Hall concert venue in the northwest of Moscow on Friday, according to preliminary data from the Russian Federal Security Service.

MOSCOW - At least 40 people were killed and more than 100 injured after a shooting at the Crocus City Hall concert venue in the northwest of Moscow on Friday, according to preliminary data from the Russian Federal Security Service.

Russia's Foreign Ministry called the shooting a "terrorist attack" and urged the entire world community to condemn the attack.

A criminal case for the terrorist attack has been opened, according to the Investigative Committee of Russia.

Videos posted online by Russian news agencies showed thick smoke and flames rising from the venue building.

An extensive array of police vehicles, fire engines, and ambulances were outside the building of the incident, and flames from the top of the building could be seen. Three helicopters were seen circling over the building.

More than 320 people and over 130 units of equipment were working at the scene, the Russian Ministry of Emergency Situations said, adding that the fire extended almost 13,000 square meters.

Governor of the Moscow Region Andrey Vorobyov said on Telegram that an operational headquarters has been created.

Moscow Mayor Sergey Sobyanin described the shooting as a "terrible tragedy" in his Telegram post, adding that all necessary assistance will be provided to everyone who suffered during the incident.

Moscow has canceled all sports, cultural, and other public events this weekend, Sobyanin said.

Russian Railways has increased security measures on trains and railway stations in connection with the attack, according to the railway operator.

Security measures have been strengthened at transport infrastructure facilities and in crowded places in the Moscow region, the regional department of transport said on social media.