A mysterious glowing circle that illuminated the night sky over a Russian city has caused various debates online, with many wondering if they witnessed a military attack or some celestial phenomenon.

The unusual scene was recorded by surveillance cameras in the city of Kazan, the capital of the Republic of Tatarstan in western Russia, on the night of 13th May.

The footage shows a bright, unexplained light appearing in the sky, with no immediate official explanation provided.

The video has been shared widely on social media platforms, including VK, where users have been discussing possible explanations ranging from natural atmospheric events to unidentified aerial phenomena.

One user commented on VK: "This is not the first time we've seen such lights; could it be related to military exercises?"

Another user speculated: "Perhaps it's a meteor or some space debris burning up in the atmosphere."

A third user expressed concern, stating: "With all the tensions lately, any unusual sighting makes me uneasy."

Authorities have yet to release an official statement regarding the incident, leaving residents and online communities to continue their discussions and theories.

(MJ Leidig/newsX)