Russia’s former Prime Minister Vladimir Putin visited Volgograd (formerly Stalingrad) to mark the 80th anniversary of the Battle of Stalingrad where mysterious color-changing objects were spotted in the sky.

The mysterious color-changing objects were named UFO and their sighting occurred during a speech on a possible advance to nuclear war.

Pilots in multiple Russian planes reported that a UFO was droning over Volgograd when Vladimir Putin visited the city on the occasion. It was stated that the unidentified object 'changed its color and height' in the sky. The UFO was seen and reported to the aviation authorities by the crews of four separate passenger planes.

Former PM Putin flew to Volgograd in tight security to attend ceremonies of the 80th anniversary of the Battle of Stalingrad in the Second World War. The happenings took place when PM implied that the conflict in Ukraine could turn nuclear as the West is trying to supply the capital of Ukraine with major supplies of tanks.

He said: 'We don't send our tanks to their borders but we have the means to respond, and it won't end with the use of armoured vehicles, everyone must understand that. 'A modern war with Russia will be completely different.' This was a major threat for the ones who are stocking up with armory supplies against Russia.

An aviation channel on the social media platform Telegram stated that 'The crew of an Airbus A321 of S7 Airlines, operating flight S72046 from Sochi to Moscow, 12 minutes before reaching Volgograd at an altitude of 10,000 meters, reported that they observed an unidentified flying object at right angles to the plane, on the left side. The object was changing color and height, and the direction of movement. Later, the crews of Aeroflot (SU1125), S7 Airlines (S73750) and Rossiya (SU6358) flights confirmed this information after flying near Volgograd.'

The Russian authorities have not commented on the UFO reports.