Related Rule
Russian Federation
Practice Relating to Rule 13. Area Bombardment
The Russian Federation’s Regulations on the Application of IHL (2001) states:
It is prohibited to attack as a single military objective (target) a number of clearly separated and distinct military objectives (targets) located in a built-up area or place containing a concentration of protected persons and objects, and launch any indiscriminate attacks. 
Russian Federation, Regulations on the Application of International Humanitarian Law by the Armed Forces of the Russian Federation, Ministry of Defence of the Russian Federation, Moscow, 8 August 2001, § 21; see also § 54.