A local observatory indicated nothing fell from the sky on the day of the flash. Picture: Vyacheslav Bulatov

A huge flash lit up the early evening darkness, as shown by images taken from a dashcam on a road close to Yekaterinburg. The sky suddenly turns orange-red at 17.39 local time (though the dashcam records it as 18.39). For the next 11 seconds an orange light with yellow and white in the middle engulfs the entire sky.

'For a few moments night turned into dazzling day, then everything went dark again,' said one witness.

The explosion came on 14 November but images only appeared of it today; strangely no sound was picked up.

Theories for the explosion included a missile or an object from space. Yet it did not have the same shape or pattern as the Chelyabinsk meteorite which exploded over the Urals in February 2013.

'I found nothing about it in the news. Did anyone else see it? What was it? Pictures: Vyacheslav Bulatov

The author of the footage wrote on the web: 'On Friday (November 14 , 2014 at 5.40pm) I observed a flash in the sky, on the road on the way to Rezh.

'I found nothing about it in the news. Did anyone else see it? What was it?'

The glow was also filmed by the teenagers from Yekaterinburg on mobile cameras. The main question from witnesses is 'What was it?'

According to regional television neither meteorologists nor scientists can explain the strange phenomenon. A local observatory indicated nothing fell from the sky on the day of the flash. Local officials from the Emergencies Ministry refused to comment on the happening.