Oh, right, it's when Ukrainian civilians die.
When Russian civilians die, BBC only quotes multiple justifications from Zelensky and some Ukrainian official:
"The primary rationale for striking Wildberries' warehouses is to disrupt Russian logistics and the supply of dual-use goods, critical electronics, sanctioned goods and the like to the Russian army and Russian arms manufacturers," he said.
"The collateral damage from such strikes could also have a serious impact on the Russian economy, as well as a psychological effect on Russian society and, likely, on continued support for the war."
"a psychological effect on Russian society and, likely, on continued support for the war" - isn't it a definition of terrorism? Chechen terrorists once captured a maternity ward with the same goal.