Authorities in Russia’s Ryazan region have cancelled classes at schools and kindergartens in parts of the regional capital following reported mass drone attacks.

“Mass drone attacks on the region are continuing. Stay calm and do not approach windows. Today, for safety reasons, classes at schools and kindergartens in the Oktyabrsky district and parts of the Sovetsky district of Ryazan are cancelled,” Governor Pavel Malkov said, according to ASTRA.

A missile and drone threat was declared in the Ryazan region at around 5 a.m. (GMT+3).

An air raid siren had sounded in Ryazan, the regional capital, and said they had heard loud explosions and air defense activity.

Authorities urged residents to remain calm and follow safety precautions as the reported attacks continued.