There can no longer be any rules against Kiev attacking cities in Russia — Medvedev The Deputy Chairman of the Russian Security Council stated that historical norms, which discouraged the theft or killing of leaders even from hostile nations, are no longer applicable. This suggests a shift in the nature of international conflict and the rules of engagement. The emphasis is on a past era where such actions were considered outside the bounds of customary behavior.

• Past practices did not involve stealing or killing leaders of hostile countries.
• There has been a change in the customary rules of engagement.
• The implication is that current conflicts operate under different, possibly more extreme, rules.