A huge fire broke out on the territory of "Uralmash" - one of the largest plants for heavy engineering in Russia, reports "Moscow Times".
Footballs circulating online show black smoke billowing from the factory in the Urals city of Yekaterinburg.
Russia's Emergencies Ministry said the fire had engulfed 4,500 square meters of an unidentified "workshop" and the roof collapsed over an area of 300 square meters. The fire was subsequently brought under control.
No casualties were reported.
The press service of "Uralmash" denied that the fire started from a facility of the complex and assured that there was no risk of spreading.
"The fire is on the territory of the industrial site [Uralmash], but the building does not belong to us and is far from our production facilities," said a spokesperson of the plant.