Russian President Vladimir Putin said on Monday that the terrorist attack at the Crocus City Hall concert venue near Moscow had been committed by radical Islamists, Paralel.Az reports citing Sputnik.

"We know that the crime was committed by the hands of radical Islamists, whose ideology the Islamic world itself has been fighting for centuries," Putin said.

Russia knows who carried out the terrorist attack in the Crocus concert hall, but the mastermind behind it is still in question, and we need to find out whether radical Islamists really decided to strike at the country, Russian President Vladimir Putin said on Monday.

"In the course of the joint work of our special services and law enforcement agencies, it is necessary to get answers to a number of questions, for example, whether radical, even terrorist-minded Islamic organizations are really interested in striking at Russia, which today stands for a just solution to the escalated Middle East conflict," Putin said at a consultation with Russian authorities on measures taken after the terrorist attack.

The important thing is find the mastermind behind the March 22 terrorist attach, Putin said.