Suspected Russian bot accounts posted 83.6% fewer messages on Oct. 8, the day a drone strike and fire shut Yandex’s Sasovo data center, according to an Oct. 15 report from Ukraine’s Center for Countering Disinformation (CCD). The same data shows the accounts were posting more than before within two days, TechRadar reported on Monday, Oct. 19.

Using Osavul monitoring software, CCD analysts tracked 22,664 messages from 5,201 accounts showing signs of inauthentic behavior across 26 topics in Ukraine’s Facebook and Telegram space between Oct. 6 and 12, UNITED24 Media reported .

Two dips, two shutdowns

After the Sasovo strike, daily messages in the sample fell from 4,032 to 660 and active accounts from 1,526 to 258. Telegram took the harder hit, down 90%, while Facebook fell 79.5%. The Sasovo site, in the Ryazan region, housed two of Yandex’s three supercomputers.

The Oct. 9 strike on Yandex’s Kaluga campus only partly took that site offline, and the CCD recorded no drop in activity that day.…