Russian doctrine is much different than that of the USA & other Western powers. While US forces seek to minimize civilian/collateral damage, the primary goal of Russian SF is to eliminate the threat at any cost. This is why their "ops" can result in extreme casualties to innocents.
Civilian deaths & injuries only, does not include bad guys.
Breslan School Massacre 2004: 334 deaths, 783 injuries.
Moscow theater hostage crisis 2002: 133 deaths, over 700 injured.