An interesting sighting in the skies over Prague, Czech Republic has left residents and online viewers baffled. On Wednesday morning, a cube-shaped UFO was spotted floating above the city, an event that was captured on video (see below) and subsequently shared on Reddit, reports coasttocoastam.com.

“This huge white cube was rotating in the skies for about five minutes,” the witness recounted. The odd object, according to the astonished observer, disappeared “in a moment” only to reappear shortly afterward.