Moscow [Russia], March 23 (ANI): Multiple deaths and injuries were reported after a group of armed men in combat fatigues stormed into a concert hall in Moscow and unleashed gunfire and detonated explosives among the crowd on Friday, local time, Russian media reported.  

Reuters has reported that at least 40 people have been killed and over 100 injured after five armed men fired on the crowd, in one of the worst attacks on Russia in years.  

Russia-based RT News reported, citing unofficial reports, that over 40 people have reportedly been killed and about 130 are wounded.  

Notably, the Russian authorities have not released an official death toll.  

Al Jazeera cited a video posted on social media that showed huge plumes of black smoke rising over the building.  

Another video footage from the scene showed a large plume of black smoke billowing from the burning building, which appeared engulfed in flames.  

Approximately 100 people were evacuated from the building by firefighters, TASS reported.   

Rescuers are still working to get people off the roof, according to the Main Directorate of the Ministry of Emergency Situations of the Russian Federation.     

More than 50 ambulance teams were sent to Krasnogorsk, a town in the Moscow region, to provide medical care to all those in need, the Moscow Region Ministry of Health told RIA Novosti.      

Moscow Mayor Sergei Sobyanin has expressed condolences for the people whose loved ones have been killed and called the incident a "terrible tragedy", as reported by CNN.   

Meanwhile, Russian Foreign Ministry spokesperson Maria Zakharova has termed the incident a "monstrous crime" and has also called on the world to condemn the incident.   

The White House has condemned the attack, but has clarified that there is "no indication" of any Ukrainian involvement in the attack.   

The White House said that the images of shooting in the Russian capital were "horrible and just hard to watch," Al Jazeera reported.   

"There is no indication at this time that Ukraine or Ukrainians were involved in the shooting," National Security Council spokesman John Kirby told reporters. "I would disabuse you at this early hour of any connection to Ukraine."  

Moscow has questioned Washington's firm belief of Ukraine not being involved and has asked the US to share any information it has about the attack.         

"The White House said it sees no signs that Ukraine or Ukrainians are involved in the terrorist attack in Moscow," Foreign Ministry spokeswoman Maria Zakharova said.  

"On what basis do officials in Washington draw any conclusions in the midst of a tragedy about someone's innocence?" she added.   

She said that if Washington had information, it should be shared and that if Washington had no information, it should not be talking in such a way.

(ANI) This is a syndicated news feed. HBTV has edited it for clarity.