Russian cloud services provider Yandex announced that drone attacks damaged three of its data centers, forcing it to shut down two facilities and partially disable a third.

Yandex customers are experiencing service outages, some of them reporting inability to access files stored on the company’s cloud infrastructure.

The impacted data centers are in Sasovo (hit on October 8), Kaluga (hit on October 9), and Vladimir (attacked on October 11). The Sasovo and Vladimir facilities stopped operating completely, while the Kaluga facility’s operations are degraded.