MOSCOW, March 22. /TASS/. Children have also been injured in the tragedy in the Crocus City Hall concert venue, Olga Yaroslavskaya, Ombudsperson for Children's Rights in Moscow, wrote on her Telegram channel.

"A terrible tragedy. Children were harmed. Sincere condolences to the next-of-kin of the victims. There can be no mercy for terrorists who attacked peaceful people. Strength and courage to all of us," she wrote.