A group of ambassadors of foreign diplomatic missions attend a laying ceremony at a makeshift memorial in front of the Crocus City Hall

Video. WATCH: Ambassadors lay flowers at site of Moscow concert hall massacre

Since the attack, thousands of people have brought bunches of flowers, wreaths and other tokens such as teddy bears, creating a makeshift memorial at the Crocus City Hall.

Since the attack, thousands of people have brought bunches of flowers, wreaths and other tokens such as teddy bears, creating a makeshift memorial at the Crocus City Hall.