People lay flowers at a makeshift memorial in front of the Crocus City Hall in Krasnogorsk on March 24, 2024, as Russia observes a national day of mourning after a massacre that killed more than 130 people. Photo : AFP

In this pool photograph distributed by the Russian state agency Sputnik, Russia's President Vladimir Putin makes the sign of the cross during his visit to a church of the Novo-Ogaryovo state residence outside Moscow on March 24, 2024, as Russia observes a national day of mourning after a massacre in the Crocus City Hall that killed more than 137 people, the deadliest attack in Europe to have been claimed by the Islamic State (IS) group. Photo : AFP

A woman lays flowers at a makeshift memorial in Simferopol, Crimea, on March 24, 2024, as Russia observes a national day of mourning after a massacre in the Crocus City Hall that killed more than 130 people, the deadliest attack in Europe to have been claimed by the Islamic State (IS) group. Photo : AFP

People lay flowers at a makeshift memorial in front of the Crocus City Hall in Krasnogorsk on March 24, 2024, as Russia observes a national day of mourning after a massacre that killed more than 130 people. Photo : AFP

People lay flowers at a makeshift memorial in front of the Crocus City Hall in Krasnogorsk on March 24, 2024, as Russia observes a national day of mourning after a massacre that killed more than 130 people. Photo : AFP