A woman reacts at a makeshift memorial for victims of the shooting at School No. 175 in Kazan.

People lay flowers and soldiers stand guard outside Kazan school

Soldiers stand guard and people lay flowers at a makeshift memorial for victims of the shooting at School No. 175 in the central Russian city of Kazan.

Soldiers stand guard and people lay flowers at a makeshift memorial for victims of the shooting at School No. 175 in the central Russian city of Kazan.