As could be expected, data centres are becoming war targets. Yandex is an essential part of the Russian internet and also runs meal delivery and taxis.
There's undoubtedly grounds to label it as a military target, but - like with the refineries - it will help in making Russians feel the war too.
https://kyivindependent.com/third-yandex-data-center-in-russia-shut-down-following-reported-drone-attack/