Russian President Vladimir Putin vowed retribution for those who sponsored the attack on Crocus City Hall.

'It is important for us to expose both the perpetrators and all links in that chain, including the beneficiaries of that crime,' Putin said, addressing participants in an Interior Ministry board meeting.

'We will certainly get them,' Putin said, referring to sponsors of the attack.

'Those who use this weapon, this being a weapon that is used against Russia, and this is obvious today, should understand that this is a double-edged weapon,' the president maintained.

According to Putin, crimes for money are nothing unique.

'Besides, there are no reliable agents in this professional community and anything at all can be done for money, with the perpetrators being guided only by financial rather than religious or political considerations,' he pointed out.

Everything, including any information, 'is easily bought and sold' across that community, Putin lamented.

'That said, we will definitely get the end customers,' the president reiterated.

On the evening of March 22, a terrorist attack targeted the music venue in Krasnogorsk, Moscow Region, just outside the Moscow city limits.

According to the latest data, 144 people have died, and 551 others have been injured.